Review on Lee's Pet Products Undergravel Fishbowl Filter, 2-Gallon - ALE13202 by Ashley Baldwin

loose change works great but I did what other posters suggested and bought better quality charcoal. I think there should be more cotton on the bottom, they sent a little pinch. I will replace this with more when I drain the tank. I have this in my 2.5 gallon tank with rocks about 2 inches thick. That works great. My husband unknowingly bought me a tiger mullet after I sent him for a pair of zebrafish but the baby seems to be doing fine!