Advanced Aquarium Systems has been a fixture of the Green Bay aquarium scene for decades — the shop traces its roots back to the 1980s under previous ownership, and current owner Dave has built it into something that draws compliments from expert fishkeepers visiting Wisconsin from across the country. The Milwaukee Aquarium Society's president has publicly endorsed the store, and local fish clubs benefit from Dave's generous donations. Step inside and the warmth and humidity hit you immediately — a sign that the livestock is kept in properly maintained tropical conditions.
Rows of beautifully kept tanks line the store, including several impressively large display setups with huge fish that make the shop worth a visit even if you're just browsing with kids on a rainy afternoon. The atmosphere is relaxed and pressure-free, with multiple reviewers describing a zen-like calm. The freshwater selection is where Advanced Aquarium Systems truly distinguishes itself.
Rare species that never show up at chain stores are a staple here — the owner has been known to spend 30 minutes personally walking customers through unusual additions for their tanks. Neocaridina shrimp arrive in vivid color with exceptional health, outclassing big-box competitors by a wide margin. Amano shrimp, kuhli loaches, catfish, guppies, Blue Acaras, and a rotating cast of uncommon species fill the tanks.
Live plants are notably healthier, larger, and more affordable than at competing shops. Staff members like Dwight bring genuine enthusiasm to every interaction — offering behind-the-scenes tours, explaining species in detail, and patiently helping customers plan stocking for new setups. The store also handles large tank delivery, making the leap to a bigger aquarium less daunting.
Tank accessories include an eclectic mix alongside some cool vintage ceramic decorations. 8 stars and endorsements from regional aquarium societies, Advanced Aquarium Systems has earned its reputation as one of Wisconsin's premier freshwater fish destinations. The combination of rare livestock, healthy plants, expert staff, and decades of institutional knowledge makes the drive to Green Bay well worth it.
Cody Muenster
8 reviews
Such a neat experience taking our kids here to pick out their first fish. Dwight was incredibly educational and joyful explaining all the fish species and even gave us a behind the scenes tour for some cool fish not on display!
Seth Geiger
5 reviews
The workers are so sweet and ready to help you at any moment, just give em a holler. There fish are fairly priced and they have so many options, fish and decor wise. Highly recommend Advanced Aquariums Systems, as a go to fish store!!
Justin Bukouricz
3 reviews
Walk in and was instantly told they can sell us anything because the till is broke. That was fine since we were just getting an idea of what to put in a new large tank that was recently bought and not set up yet. We Kept getting told they can’t sell anything even though we told the guy were are just getting ideas of what we want. Basically pushed out of the store at that point. If 0 star was an option I’d give it, cool fish would like to purchase fish but at this point I’ll spend my money else where since the poor service.
peter wooldridge
91 reviews
Amazing fish store
Michaelgina Ralston
4 reviews
Favorite new store. Has all the unique fish you'd never see normally at your other LFS. Plants are so much healthier, bigger and cheaper than some stores I won't even name hahaha. For sure going back!
Jaime Wheelock
7 reviews
Super nice staff. They were quick to help. And my guppies are so beautiful! They also gave me a pregnant guppy and she had her babies 3 days later. Awesome! I'm excited to see them grow.
Brenna C
29 reviews
I brought a group of adults with disabilities to check out the fish and get some supplies for a project. The employees were very accommodating, helpful and kind to everyone! There is a ramp to get inside and most of the store is wide enough for a wheelchair to navigate.
Danny Panella
6 reviews
Absolutely fantastic experience with Advanced Aquarium Systems! I’ve bought fish here before, but recently had a large tank delivered, and the staff went above and beyond. They’re incredibly friendly, knowledgeable, and patient—always willing to answer questions and provide guidance. Truly a top-notch aquarium business that makes every step easy and enjoyable. Highly recommend!
Isaac Miller
38 reviews
My wife and I did not purchase anything from there but the prices were perfect and the place is set up amazingly!
Ellen Wicker
138 reviews
The moment I walked in I felt comfortable. No pressure or rush to purchase anything. Staff is very knowledgeable and helpful.
Note: Store information and services may change. Always call (920) 432-6669 to confirm current availability, hours, and services before visiting Advanced Aquarium Systems.
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(920) 432-6669Address
1720 S Ashland Ave, Green Bay, WI 54304
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1720 S Ashland Ave, Green Bay, WI 54304
February 7, 2026
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