Review on Aquapapa 4X Bio Sponge Filter: Ideal Betta Fry Aquarium Solution for Tanks up to 15 Gal by Sarah Liggons

Perfect filter for my 1.5 gallon Tetra Cube. Extremely easy to care for. Simply take out the sponge, rinse in the aquarium water during the weekly water change, put it back in, done. I have the dual sponge version in my 3 gallon cube and 5 gallon tank and the plus size dual sponge in my 20 gallon tank. Cleaning couldn't be easier. I've added a picture with the dimensions of the tubes and the diameter of the sponge. Hope that helps.