Originally Posted by glock26
Ok thanks I just did it last week apparently I need to do it more often. I usually squeeze and rinse sponge in bucket of tank water. But, apparently will have to clean entire thing.
A pre-filter will help a lot. Mine seemed to deliberately do that just as I was settling in for the night and was in no mood to clean a filter.
One sign it's soon to happen: look at the water in the intake tube side - it should be flowing smoothly. If it's at all turbulent, it's a sign you have a clogging sponge (the water is rerouting).