Review on Enhance Aquatic Filtration with Powkoo Sponge Filter - The Ideal Corner Filter for Aquariums by Darla Wilmoth

Wow, that was a real challenge. First you have to press it a few times to fill the cells with water so that it sits in a corner. The position of the airline can greatly affect the tilt of the placement. Second, in a 10-gallon aquarium, this thing resembles a garbage chute in terms of the number, size, and strength of the bubbles. I think my exit is downward, but it's still ridiculous compared to the double barrel style I have in the two tanks next to it which are virtually silent and powerful when everyone is out. Also, I am using a new aquarium just for shrimp and after two days of work there is nothing left on the sponge. I replaced it with the one that came with my tank setup and now it's clear. Both return.