i have biowheel on 3 of my 9 tanks.. the biowheels a great, but loud. They sometimes stop pumping and exit the water when snails get stuck in propeller. make sure to keep snails out of filter if its a biowheel. Another this already suggested is maintainence. alway clean bearings and areas from debris and sludge that forms in our filters. Change the pads (not the wheels) often, I was told to reuse the pads and did for a while, but realized it makes it worse. all the biological is in the wheels anyway. Also, the wheels arent ment to turn all the time. it does stop and pause allowing oxygen and bacteria to get on wheels for more area used. If u go on its website and call customer service they will tell u sane thing. If one wheel is Always stopped. then u have a water level or house level problem (means water in tank not level). these filters need to be in a tank that is leveled. if one side of aqaurium is higher in water level than the other, it will never work properly. I however, like the fluval 405 or the aquaclear 110 much better, Not 1 problem with the 110. its on my 65g. We have the fluval in the 150g. and the other biowheels are on the 29g, 45g, and 20g.
