So I have a 33L brackish setup and I have an aquaclear 30 and a 10 gallon walmart style filter (tetra or whisper or something). The filter from walmart is only a couple months old and the aquaclear filter I got for free used. The aquaclear filter does not start up unless you get the impeller spinning yourself, I can understand that as it is used. I am planning on upgrading to some kind of low flow 30+ gallon filter for the tank soon anyways. But my 10 gallon filter now is starting to have problems. It shut off on me yesterday and it is making grinding sounds. This filter is only a couple of months old! Could it be the salt from the brackish water is jamming it?