Review on A Complete Review of the Aqueon QuietFlow Internal Shrimp Filter 20 Gallons: Performance, Features, and Benefits by Ken Gray

I've used this filter on 20 gallons and it does the job, it's just not the best filter I've used. I tried to get away from the bulky classic sponge filters, but after two months of use I decided to just go back to the regular sponge filter. The entire filter accumulates with algae very quickly and the suction sponge does not work as efficiently as it is a small area to clean as plant parts and other debris cover/clog it fairly quickly.