Leen
Member
During my regular maintenance last thursday I replaced my carbon filter. I had some trouble turning the filter back on but figured out that the problem was a very dirty impeller and impeller well. I cleaned that out and it started right up. Ever since then, the filter makes a strange noise about every 10-15 minutes. The noise sounds almost as if something is getting caught in the filter that shouldn't be there. At first I thought it was maybe the current causing gravel to hit the glass. But then I realized the noise was coming from inside the filter itself. Today, I cleaned the filter once again, thinking maybe i'd left some debris in it. It is still making the same noise. It almost sounds like something solid is hitting the impeller, but because it occurs so frequently I have no clue what it could be. Could it possibly be the new carbon? Does it normally make a crackling noise when new? My tank is staying very clean and the filter is working perfectly, but i'm worried about this noise. I don't know if its going to eventually break my filter. Any ideas or input would be greatly appreciated. Thanks