I need help with my sump. I’ve only had it about a month. Every now and again, the water on the return pump side gets really low. At first I thought it was a top off issue, but my top off works fine.... the water level in the skimmer and filter sock sections are where they’re supposed to be. I can’t figure out why this happens. I’ve considered that my filter sock needs to be cleaned but water seems to be flowing fine in that section. Help please?