First, I use sponge filters in all my tanks and I’m not ashamed. They’re soft on fish bodies, easy to clean, effective, and they won’t even suck up fish babies, water clarity is GREAT and they Bioseedovernight (If you have a donor system). No moving parts. Every once in a while you have to take them out and clean the sponge, and replace the air stone, if you use an airstone in them, at all.
TBH I don’t even hide them.
The second reason for this article is that at the time of it’s publication, I found these monstrous 8x8x8″ 250-gallon size sponge filters at TEN BUCKS on Amazon, while literally EVERYONE else sells them for $23 to $25 each. I bought a dozen when I saw this. I don’t know if, by the time you read this, whether they’ll still be $10.
Dr Erik Johnson is a Marietta, Georgia Veterinarian with a practice in small animal medicine. He graduated from University of Georgia with his Doctorate in 1991. Dr Johnson is the author of several texts on Koi and Pond Fish Health and Disease as well as numerous articles on dog and cat health topics.