We are starting a 2nd aquarium....only a small Hex aquarium.....we were using the Bio-Wheel 20 gallon filter, but 2 of them have completely stopped working inside of 1 day.
Anyone have any idea why that might be? Terribly frustrating and disheartening.
small-gravel bottom, water level seems high enough.
No fish or plants or anything in the tank yet.
Really no idea what is causing it, but the start fine then a few hours later they are dead.
If anyone has any insights, we need help please