Review on 🌀 Optimized CNZ Air Driven Biochemical Bio Sponge Filter by Laura Thompson

Honestly, it's not that easy to tell how much suction power these little devices have. One of them can't handle a 10 gallon tank alone, but a 5 gallon tank containing something like "fry" or a few "triplets" of guppies or a small school of cardinals will reach their limits. Anything below those levels and they do it pretty well. I have one of these in combination with a bubble filter in a 10 gallon tank with an 8" frontosa. She was there for about a month for treatment and the filters kept the shape of the tanker and the shape of the stubble. I use them most often in 1 gallon. and 2.5 gallon aquariums with my bettas.