I am using this as a supplement to my hang on back to help filter and move water on the "dead" side of the tank. After about 2 weeks, my water was crystal clear. While I've never really had water issues, I could never get my tank water crystal clear. Now it is and my fish and I are extremely happy.
Love this filter. Also bought big sponge filter along with pre sponge filter work great. Would recommend everyone should use a sponge filter. Also have HOB filters with the sponge.
Absolutely wonderful, works like a charm and is easy to clean.
I doubled them in every 30 gallon tank. Works great. Thanks
i ordered 2 of your small filters. one to use on 20 high and one to have as a back up if i need to start a new tank. after about a month of so my water tested great. and i only gravel vac to get all the fish poop out. so far i love it in my guppies tank.