Inflow: Aquatic Animal Life Support Systems and Habitats

Joe and Dr. Jeff
  • 5.0 (7)
  • Natural Sciences

Joe and Dr. Jeff discuss all things related to Zoo and Aquarium Aquatic Animal Life Support Systems. Everything from water treatment equipment and design to operations and construction. We talk to operators, engineers, architects, curators, and anyone and everyone who works on keeping our zoo and aquarium water clean, our animals healthy, our exhibits natural and our systems sustainable.

  1. 5d ago

    Ep 50 - Denitrification, Ozone, and Over 60 Combined Years in LSS: The Hosts Trade Seats

    To celebrate 50 episodes, Inflow flips the format: instead of interviewing a guest, hosts Joe Arlotto and Dr. Jeff sit down to interview each other. Between them they bring over 60 combined years of aquatic animal life support systems experience — Joe's path runs through Brookfield Zoo, Albuquerque Aquarium, San Diego Zoo, and SeaWorld Abu Dhabi, while Dr. Jeff's began in October 1989 at Walt Disney World's The Living Seas before moving through Walt Disney Imagineering and independent LSS consulting. This milestone conversation traces how a casual chat on a bus to a zoo conference turned into a podcast documenting the history of the LSS field, and digs into the technical topics that have defined both hosts' careers: denitrification (batch vs. continuous flow, carbon sources, and digester design), wetland and salt marsh filtration, the early days of ozone and ORP chemistry in seawater systems, and the shift from operating life support systems to designing them — including how CFD modeling shapes sump and skimmer placement today. Along the way, Joe and Dr. Jeff share the career stories behind the science: a midnight resume drop at Brookfield Zoo, a round-the-world trip after the Navy, a PhD finished on a Thursday and a start date at Disney the following Monday, and a 30-year full-circle trip through the Persian Gulf. Whether you're an LSS operator, designer, or aquatic life support enthusiast, this episode is a rare, candid look at how two very different paths led to the same field — and what both hosts have learned about designing, building, and operating the systems that keep aquatic life thriving. This episode is brought to you by Aquatic Equipment and Design, Cloward H2O, and Longhorn Organics — thank you for supporting Inflow and the LSS community. Inflow is the podcast where we discuss all things related to aquatic animal life support. Subscribe, leave a review, and find more episodes, show notes, and sponsor info at https://inflowlsspodcast.com/. Chapters (0:51) Episode 50 Milestone (1:36) Origins of the Inflow Podcast: The Bus Ride at the AALSO Conference (4:25) Joe's Background: Navy, Backpacking, and Landing the Brookfield Zoo Job (6:12) Navy and Military Backgrounds Shaping LSS Careers (16:40) Joe's Career Path Through Albuquerque Aquarium and San Diego Zoo (17:48) Dr. Jeff's Background: PhD and Starting at Disney's Living Seas in 1989 (22:58) Ozone and ORP: History and Chemistry (29:27) Denitrification Deep Dive: Batch vs. Continuous Flow, Carbon Sources, Digesters (35:34) Wetland and Salt Marsh Filtration, Steady-State Nitrate (37:22) Dr. Jeff's Path Through Walt Disney Imagineering and Independent Consulting (EEG) (42:14) LSS Design vs. Operations: Why Joe Moved into Design (49:23) CFD Modeling for LSS Design (50:45) Joe's Move to SeaWorld Abu Dhabi and Construction-Phase Realities (52:52) Dr. Jeff's Broader Environmental Design Work: Coatings, Substrates, HVAC, Penguin Habitats (56:05) Closing Advice

    Ep 50 - Denitrification, Ozone, and Over 60 Combined Years in LSS: The Hosts Trade Seats

  2. Aug 19

    Ep 49 - Zoo vs. Aquarium: What 27 Years in Life Support Taught Matt Regensburger

    What does 27 years of aquatic life support experience actually teach you about designing, building, and operating exhibits that work? On this episode of Inflow, hosts Joe Arlotto and Dr. Jeff Keaffaber sit down with Matt Regensburger of Tenji Aquarium Design to trace his path from life support operator at the St. Louis Zoo, to a high-intensity, 24-hour operation at Georgia Aquarium, to helping open St. Louis Aquarium right before COVID hit — and finally into design-build work with Tenji. Matt breaks down the real differences between zoo-based and aquarium-based life support systems, from control platforms and floor layouts to the culture shock of moving from a 90-acre zoo campus to a high-speed, multi-floor aquarium. He and the hosts dig into what it means to be involved in a project from concept through design, construction, and startup — and why that full-circle experience changes how you troubleshoot. The conversation also covers Tenji's design-build approach, how the team uses Revit for clash detection, working with performance specs, coral and reef system design (calcium reactors vs. automated dosing), and how Tenji partners with owners who range from expert aquarium curators to first-time operators at restaurants and science centers. Matt closes with his advice for anyone starting out in life support: be curious, ask questions, and watch out once you've got a year of experience under your belt. Whether you're an LSS operator, an aquarium design professional, or just curious about what it takes to keep a 7,500-gallon reef tank running, this episode offers a rare look at the full lifecycle of an aquatic life support project. Guest: Matt Regensburger, Construction Project Manager, Tenji Aquarium Design Inflow is the podcast where we discuss all things related to aquatic animal life support. This episode is sponsored by Ardura and Matt LSS. Subscribe, leave a review, and find more episodes, show notes, and sponsor info at https://inflowlsspodcast.com/. Chapters (3:40) Guest Introduction: Matt Regensburger of Tenji Aquarium Design (4:28) Matt's Background: St. Louis Roots and Becoming an Aquarist (5:17) Early Career at the St. Louis Zoo Life Support Department (7:41) Working with Aging, Historic Facility Infrastructure (10:29) The Move to Georgia Aquarium (12:00) Zoo vs. Aquarium Life Support: Control Systems and Layout (15:30) Moving into Management at Georgia Aquarium (17:04) Returning to St. Louis to Help Open St. Louis Aquarium (27:15) The COVID Shutdown Right After Opening (27:57) Introducing Tenji Aquarium Design and the Design-Build Model (29:30) Integrating with Other Design Disciplines via Revit and AutoCAD (30:44) How Tenji Finds and Lands Projects (33:32) Coral and Reef System Design: Dosing, Calcium Reactors, and Birch Aquarium (36:26) Working with First-Time Owners and Performance Specs (42:48) Closing Advice: Be Curious, Be Careful (44:54) Outro and Sign-Off

    Ep 49 - Zoo vs. Aquarium: What 27 Years in Life Support Taught Matt Regensburger

  3. Jul 27

    Ep 48 - Inside the Aquarium of the Boardwalk: Life Support Lessons with Alex Hunter

    Inside the Aquarium of the Boardwalk: Life Support Lessons with Alex Hunter What does it take to build and operate the life support systems for one of America's newest public aquariums? In this episode of INFLOW, hosts Joe Arlotto and Dr. Jeff Keaffaber are joined by Alex Hunter, Director of Life Support at the Aquarium of the Boardwalk, for an in-depth conversation about launching a modern aquarium from the ground up. Alex shares his career journey, the challenges of commissioning a brand-new life support system, and the lessons learned from balancing innovative design with the day-to-day realities of aquarium operations. The discussion explores aquarium filtration, water quality management, life support engineering, startup commissioning, equipment selection, troubleshooting, and the importance of collaboration between designers, contractors, and operators. Whether you're an aquarium professional, life support system engineer, aquatic animal specialist, or simply fascinated by the science behind world-class aquariums, this episode offers practical insights into creating stable, healthy environments for aquatic life and the people who care for it. In this episode, you'll learn about: Launching the Aquarium of the Boardwalk Life support system (LSS) design and commissioning Aquarium filtration and water quality management Startup challenges and operational lessons Collaboration between engineers and aquarium operators Best practices for maintaining healthy aquatic habitats Career advice for aspiring LSS professionals (3:14) - Meet Alex Hunter (6:55) - Moving Up by Moving On (10:18) - Mirage to Mandalay Bay (11:41) - Mammal vs Fish Systems (13:23) - Startup Staffing Realities (16:14) - Turnover and Training Legacy (19:07) - Aquarium of the Boardwalk Systems (21:59) - Power Failures and Backup Generator (26:28) - Filtration System Layout (27:38) - Drum Filters Deep Dive 3 (32:34) - Sand Filters Backwash (36:36) - CapEx and Risk Mitigation (40:18) - Isolation Valve Project (42:35) - AALSO Community Impact (46:03) - Certification Career Ladder (47:35) - Advice for New Operators  Thanks to Our Sponsors This episode of INFLOW is made possible by our sponsors: MDM Pumps – A trusted leader in high-performance pumps engineered for demanding aquatic life support applications. MDM Pumps delivers reliable, energy-efficient solutions that help aquariums, zoos, and aquatic facilities maintain exceptional water quality. Telchine – Providing advanced automation and control solutions for aquarium life support systems, Telchine helps operators monitor, optimize, and manage critical LSS processes with precision, reliability, and real-time insights. Subscribe to INFLOW for conversations with the leading experts shaping the future of aquatic animal life support systems, aquarium engineering, filtration technology, water quality science, and aquatic habitat design.

    Ep 48 - Inside the Aquarium of the Boardwalk: Life Support Lessons with Alex Hunter

  4. Jul 13

    Ep 47 - How MAT LSS Is Rethinking Aquarium Filtration and Life Support

    What does it take to design life support systems for some of the world's most ambitious aquariums? In this episode of INFLOW, hosts Joe Arlotto and Dr. Jeff Keaffaber sit down with Nurettin Ersu, founder of MAT LSS, to explore the engineering philosophies, innovative filtration technologies, and practical lessons that are shaping the next generation of aquatic life support systems. Drawing from decades of experience designing and commissioning aquarium projects around the world, Nurretin discusses the evolution of aquarium filtration, advances in life support system (LSS) design, balancing water quality with operational efficiency, and the importance of creating systems that are both reliable and sustainable. The conversation also dives into engineering challenges, international collaboration, emerging technologies, and what today's designers and operators should consider when planning future aquatic facilities. Whether you're an aquarium professional, life support operator, engineer, aquatic veterinarian, consultant, or student entering the field, this episode offers valuable insights into the science and engineering behind healthy aquatic environments. In this episode, you'll learn about: Modern aquarium life support system (LSS) design Aquarium filtration innovations and engineering principles Water quality management and biological filtration Designing reliable, efficient aquatic systems Lessons learned from international aquarium projects The future of aquarium engineering and aquatic animal life support (3:30) - Meet Nurettin and MAT Growth (17:07) - Skid Systems and Client Support (29:06) - Supply Chain Lead Times (32:05) - Seaworld Mega Project Lessons (40:12) - Training Operations And US Market Subscribe to INFLOW for conversations with the leading experts in aquarium engineering, aquatic animal care, water treatment, and life support systems. New episodes feature industry leaders sharing practical knowledge, technical expertise, and real-world solutions for public aquariums, zoos, research facilities, and aquatic professionals worldwide.

    Ep 47 - How MAT LSS Is Rethinking Aquarium Filtration and Life Support

  5. Jun 25

    Ep 46 - A Career Built Around Water: Dane Tullock on Aquariums, Aquaculture, and Life Support Systems

    What does it take to build a career that spans aquaculture, exhibit construction, life support systems, and executive leadership? In this episode of INFLOW, hosts Joe and Dr. Jeff sit down with Dane Tullock to explore a career shaped by curiosity, collaboration, and a passion for advancing the aquarium industry. Dane shares how his journey from aquarist to aquarium executive gave him a unique perspective on life support systems (LSS), facility design, and the critical role aquarists play in successful projects. The conversation explores why owner involvement is essential during aquarium planning and construction, how husbandry and engineering teams can work together more effectively, and the lessons learned from decades of designing, building, and operating aquatic facilities. Whether you're an aquarist, LSS operator, engineer, designer, or aquarium leader, this episode offers valuable insights into career development, interdisciplinary collaboration, and the future of public aquarium operations. In this episode: Dane Tullock's career path from aquarist to executive leadership Why aquarists should have a seat at the design table Best practices for aquarium and life support system (LSS) design Bridging the gap between husbandry, engineering, and operations Lessons from aquaculture, exhibit construction, and public aquariums Advice for the next generation of aquarium professionals (2:58) - Meet Dane  (10:33) - Grad School and Aquaculture (13:14) - Virginia Aquarium Expansion (17:41) - Ripley's Myrtle Beach Build (27:03) - Sixth Sense and System Balance (30:43) - Next Stop Gatlinburg (35:34) - Leaving Ripley's Path (38:48) - Burnout and REI Shift (41:12) - Back to Ripley's Toronto (44:14) - Transfer and Florida Return (50:19) - Planning and Overtime Lessons (55:01) - Renovations and Conservation Focus (58:42) - Career Advice and Wrap-Up INFLOW is the podcast for professionals working in aquarium life support systems, water quality, aquatic engineering, and public aquarium operations. Subscribe on Apple Podcasts and Spotify for conversations with the industry's leading experts on LSS design, operations, maintenance, and innovation.

    Ep 46 - A Career Built Around Water: Dane Tullock on Aquariums, Aquaculture, and Life Support Systems

  6. Jun 8

    Ep 45 - Building an LSS Computer Model

    What if you could predict water quality problems before they happen? In this episode of INFLOW, hosts Joe Arlotto and Dr. Jeff Keaffaber sit down with Paul Cooley, Aquatics Director at PC Aquatics and Senior Engineer with Ardurra, along with Chris Carr, Director of Life Support Systems at Long Beach Aquarium of the Pacific, to explore a groundbreaking new tool for the aquatic animal life support industry: a comprehensive Life Support System (LSS) computer model. Drawing on real-world data from Long Beach Aquarium of the Pacific, Paul and Chris discuss how advanced modeling is being used to simulate and predict critical water quality parameters, including dissolved oxygen, ammonia, nitrite, nitrate, pH, alkalinity, carbon dioxide, phosphorus, temperature, and more. The conversation explores how digital modeling can help operators troubleshoot system performance, optimize filtration processes, improve emergency preparedness, and even influence the design of future aquariums and aquatic facilities. The group also examines how data-driven decision-making, predictive analytics, and emerging AI technologies could transform aquatic animal life support operations by helping facilities conserve water, save energy, improve sustainability, and provide healthier environments for animals. Whether you're an LSS operator, aquarium engineer, aquatics professional, zoo professional, consultant, or student entering the field, this episode offers a fascinating look at the future of aquarium water quality management and the next generation of life support system design. Topics covered include: Life support system (LSS) computer modeling Aquarium water quality prediction Dissolved oxygen (DO) management Nitrogen, carbon, and phosphorus cycles Aquarium design and engineering Life support troubleshooting Sea otter habitat water quality Predictive analytics for aquariums AI applications in aquatic animal life support Sustainable aquarium operations (0:27) - What Innovation Means (4:10) - AALSO Conference Meetup (5:25) - Paul's Water Quality Model (7:34) - Long Beach DO Case Study (12:32) - Operator Simulation Tool (15:03) - Troubleshooting DO Systemwide (19:44) - Design and Sustainability Uses (24:16) - Future Features and Data Needs (27:06) - CO2 vs Turbidity Priorities (29:56) - Animal Health Data Ideas (32:55) - Long Beach Testing Roadmap (37:40) - Iterating the Model Interface (38:46) - Sponsor Break - Longhorn Organics (42:53) - Chris Carr Otter DO Crisis (45:35) - DO Mapping and Backwash Tradeoffs (48:53) - Beyond DO Coliform Predictions (50:45) - Data Call and Wrap Up Subscribe to INFLOW for conversations with the leaders, engineers, scientists, and operators shaping the future of aquatic animal life support systems. Stay connected at https://inflowlsspodcast.com

    Ep 45 - Building an LSS Computer Model

  7. May 28

    Ep 44 - Inside AALSO 26 Part 1: Lessons from Chris Carr & Sean Bourgeois

    In Part 1 of this special AALSO 26 series, the INFLOW podcast welcomes Chris Carr and Sean Bourgeois for an in-depth conversation on the evolving world of aquarium life support systems, aquatic engineering, and large-scale facility operations. From system design and project execution to troubleshooting complex aquatic environments, Chris and Sean share real-world insights from the front lines of the aquarium industry. Hosts Joe Arlotto and Dr. Jeff Keaffaber explore the challenges of balancing engineering, water quality, animal care, and operational efficiency in modern aquariums and aquatic facilities. This episode dives into practical lessons learned from major projects, the importance of collaboration between operators and designers, and the future of life support innovation. Whether you work in aquarium operations, aquatic engineering, water treatment, zoological facilities, or life support system design, this episode delivers valuable perspectives from two respected voices in the industry. Topics include: • Aquarium life support systems (LSS) • Aquatic engineering and system design • Water quality management • Aquarium operations and maintenance • AALSO 26 insights and industry trends • Large-scale aquatic facility projects • Collaboration between designers and operators • Lessons learned from the field (0:31) AALSO 26 Highlights (7:29) - Origins of AALSO (12:12) - Chris Carr Career Path (16:22) - Long Beach Aquarium of the Pacific Overview (20:32) - Saltwater Loop and Staffing (23:46) - Life Support and Water Quality (25:12) Sponsor Break: MDM Pumps (30:47) - Sean Career Path (34:10) - Big Tanks Expansion (40:32) - Saltwater Intake Process (43:00) - Salinity And ORP Talk (44:35) - Drum Filters And Day Tanks (50:06) - Biggest Operational Challenges (52:41) - Conference Takeaways Subscribe to INFLOW for conversations with leading experts in aquarium engineering, aquatic animal care, and life support technology. Stay connected at inflowlsspodcast.com

    Ep 44 - Inside AALSO 26 Part 1: Lessons from Chris Carr & Sean Bourgeois

  8. May 8

    Ep 43 - Clear Views, Complex Systems: The Role of Acrylic in Modern Aquariums

    In this episode of the INFLOW podcast, hosts Joe Arlotto and Dr. Jeff Keaffaber sit down with Zack Behrendt of American Sealants, Inc. for an in-depth conversation about the critical role acrylic plays in modern aquarium design, aquatic animal life support systems, and large-scale habitat construction. From massive viewing panels and underwater tunnels to structural bonding, waterproofing, and long-term maintenance, Zack shares expert insight into the engineering challenges behind public aquariums, zoos, marine mammal habitats, and aquatic exhibits. The discussion explores how acrylic technology has evolved, why proper sealing and installation are essential for animal safety and water quality, and how operators and designers can avoid costly failures in aquarium infrastructure. Whether you work in aquarium life support systems (LSS), aquatic engineering, exhibit fabrication, public aquarium operations, or marine construction, this episode delivers valuable knowledge on acrylic systems, aquarium maintenance, exhibit longevity, and the intersection of engineering and animal care. Topics include: Aquarium acrylic panel installation Sealants and waterproofing systems Public aquarium construction Life support system design Structural engineering for aquatic exhibits Acrylic maintenance and repair Marine habitat infrastructure Water containment solutions Aquarium operations and design collaboration Challenges in large-scale aquatic facilities (2:50) - Meet Zack (5:27) - ASI Services Overview  (9:07) - Design Coordination and Engineering  (11:11) - Glass vs Acrylic Tradeoffs (14:21) - Sealing and Support Details (16:24) - Catastrophic Failures and Inspections (22:13) - Common Leaks and Dye Testing (27:33) - Underwater Seal Repair Methods (30:19) - Polishing and Scratch Tiers (34:16) - UV Aging and Refill Rate Rules  (43:25) - Robots and Cleaning Tech  (45:55) - Chemical Do and Dont List (48:00) - Career Advice and Wrap Up INFLOW is the podcast dedicated to aquatic animal life support systems, aquarium engineering, water quality, and the professionals advancing the public aquarium industry.

    Ep 43 - Clear Views, Complex Systems: The Role of Acrylic in Modern Aquariums
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Joe and Dr. Jeff discuss all things related to Zoo and Aquarium Aquatic Animal Life Support Systems. Everything from water treatment equipment and design to operations and construction. We talk to operators, engineers, architects, curators, and anyone and everyone who works on keeping our zoo and aquarium water clean, our animals healthy, our exhibits natural and our systems sustainable.

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