AQUANEAT Aquarium Bio Sponge Filter Breeding Beta Shrimp Nano Fish Tank Water Corner Filter 10 Gallon

I've had this for a few months and am very pleased with it. It works great in my 5.5 gallon planted betta tank. I like how it fits into a corner. I was able to fit an airstone in with very minimal modification. Even with reducing the airflow for my betta it has great suction and picks up debris very well. It is super easy to clean. My betta actually spends a lot of time hanging out right next to it and surfing the current. Will definitely buy again.

Does it's job just fine. Sometimes I worry about shrimp getting wedged between the glass and filter so I don't really find myself getting it perfectly lined up in the corner, maybe defeating the purpose of the shape in my experience, but it's a nice little sponge filter that does the job great when combined with a USB air pump for all my smaller tanks.

Fits great in the corner of my 5 gallon betta tank.

The filter works, but it does have a hard time with NOT floating. It's also very difficult to put an air stone into it so please beware! (this is about the small corner filter)

Large bubbles are a little noisy, but an air stone (not included ) would fix the issue