Dynamic Tank Design in Freeport, New York, is a saltwater-focused aquarium service company run by Marc, whose name comes up in nearly every review with a kind of reverence usually reserved for the best reef keepers in the hobby. This isn't your typical fish store with rows of display tanks — it's a specialized operation built around tank setup, maintenance, and especially Neptune Apex system programming, which has become something of a signature offering. Marc's expertise with the Apex ecosystem is a recurring theme.
" He's handled everything from emergency plumbing repairs on saltwater systems to full Vortec pump installations conducted over Zoom calls, serving clients not just on Long Island but several states away. The service model is distinctly relationship-driven. One customer has relied on Marc for a decade.
Another describes him responding immediately to an equipment failure while they were on vacation, preventing livestock loss. A client with a 210-gallon mixed reef tank called him in a panic before a trip when their Trident went down — Marc had the replacement unit running in short order. Carlos, another team member, earned praise for helping a hobbyist finally defeat green hair algae with patient, detailed reef-keeping guidance.
Beyond maintenance, Dynamic Tank Design sells equipment and sources hard-to-find gear, sometimes connecting with hobbyists through Facebook groups. One Tennessee-based customer initially skeptical of a long-distance purchase ended up returning repeatedly after Marc provided serial numbers, photos, and genuine transparency. The company also handles large-scale physical work — two guys moved a 200-gallon tank into a basement in two hours.
For reef hobbyists who want serious technical support and someone who will answer the phone during a crisis, Dynamic Tank Design delivers.
Cono Savino
7 reviews
I had a major plumbing problem with my saltwater tank. Called Mark and he was trying to figure out how to repair it . He came after hours because he was worried about the live stock . He repaired it and am very appreciative that he did . He takes great pride of what he does and will help out anyway that he can .
Robin Rah
2 reviews
I had a sudden issue with my tank while on vacation—equipment failure that threatened the health of my fish—and they responded immediately fixing the issue and preventing further damage and loss. If you’re looking for an aquarium service that’s reliable, responsive, and truly cares, I highly recommend them. I won’t trust my tank with anyone else!
Ronald Barber
6 reviews
Marc brought my saltwater tank back to life! The water quality has improved significantly, and my fish and corals are noticeably more vibrant and healthy. He takes the time to do things right and really pays attention to the details. Marc also installed an Apex system for me, which has made it so much easier to monitor and maintain water quality. I highly recommend his services to anyone serious about keeping a thriving saltwater tank!
Jolanta
Marc set up my entire saltwater tank from the start and did an amazing job. Recently, I had an issue with some of my corals starting to die, and he came over right away to check things out. He took his time diagnosing the problem and gave me thoughtful, knowledgeable advice on how to get everything back on track. It's clear he genuinely cares about the health of the tank and his clients' success. Super professional, reliable, and passionate about what he does. Thank you so much!
Jeff Levinsohn
Marc has been servicing my tank since I started it ten years ago. What I appreciate most about him is his willingness to answer any question or solve any problem whenever it comes up. He is extremely dedicated to his customers and thanks to him my tank always looks great.
Craig Punak
9 reviews
Marc at Dynamic Tank is outstanding to work with. He is extremely knowledgeable with the Apex system, diagnosing repairing and writing new coding. I recently had my Trident water analysis system go down just before leaving on vacation. I was In an absolute panic with my 210 mixed reef tank. Marc immediately jumped in and got my new Trident unit up and running. If you have an Apex system you really need someone like Marc to get you back up and running timely and professionally. Keep up the great job, I'm a customer for life! Craig
Joseph Dinbokowitz
18 reviews
Great company and plan on doing business with them again. I can’t say enough good things about them. Very knowledgeable too!!! When he showed up with one other guy to move my 200 gallon tank into my basement I thought it was impossible Two hours later it was in! Thanks again!!
Alex Youn
Very nice people and they always help me out!
William Garrett
I had been overwhelmed with GHA but with the help of Carlos at dynamic tanks have finally gotten rid of all the stuff. Along the way have gotten top notch advice on various things to do on other aspects of reef keeping. Below are before and after photos.
David
I never had a problem maintaining my tank on my own, except I struggle with Neptune Apex programming and the inherent idiosyncrasies which arise from time to time. Hiring Dynamic Tank Design has completely removed the need for a local person to service my tank. Marc remotely reconfigured all of my settings and my Alkalinity, Calcim and Magnesium have never been more stable, which has let to explosive SPS growth. Additionally. Marc has assisted in a rewire and Vortec installation, all remotely and via Zoom calls. Marc is always available for those freak-out moments and even caught and prevented an alkalinity crash, due to my error of improperly mixing my 2-part. I can't say enough about Dynamic Tank Design and will be a customer for as long as I keep my reef, which with their help will be a long time!
Note: Store information and services may change. Always call (516) 546-3474 to confirm current availability, hours, and services before visiting Dynamic Tank Design.
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12a Filmore Pl, Freeport, NY 11520
February 7, 2026
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