Review on Capetsma Aquarium Filter Sponge Fish Tank Filter Kit - Ultra Quiet Sponge Filter for Aquarium Air Pump, Includes Spare Sponge and Bio Balls by Betsy Tran

A really great addition to my tank. I added this to a heavily stocked 75. Hanging on the rear filter I had wasn't enough. This filter works very well. Biobeads increase the surface area for beneficial bacteria. Sponges can be easily removed for rinsing, which is convenient for quick and easy cleaning. The top slides out so it can be placed in either a taller tank like mine or a shorter tank. It would be pretty easy to hide behind plants or other decor. I think it would be great at 30-55 on its own. I added a video (the noise is the fan not this filter)