Review on 🐠 Ultimate AQUANEAT Double Bio Sponge Filter: Powerful & Silent Aquarium Filter for Betta Fry Shrimp Tanks with Ceramic Media Balls, Airline Tubing, Air Pump Valves, Suction Cups by Lisa Perez

Very happy with this product. I had to search YouTube videos for proper instructions on setting up this system, but once I got it working everything was fine. After about 10 days in a 15 gallon aquarium with 2 large (approx 5″) goldfish the green scum turned visibly brownish so I took them off and rinsed them really well in a container of water and was amazed at how much dirt there was was left in them. As such, they seem to do a very efficient job of keeping the water clean. The only problem now is finding the green replacement foam instead of the black one everyone sells because it's a lot easier to see when it needs to be flushed out.