My marineland 350 is making a grinding sound. I have cleaned it out twice but it continues to do it. I dont think its affecting the filtering process but its annoying to listen to. Do you think its time for a new 350?
Pour water in the filters to get it going.
Pull out the empeller with the magnet and rinse the magnet beccause sometimes it gets jammed and clean it. and adjust it till it stops making noise.