So, when I clean the bottom of the pool I notice that the flow/pressure coming back out drops off significantly compared to how it was right before the cleaning starts. The pressure doesn't change, so what I've been doing is turning the pump off and setting it to either "bypass to waste" or "rinse" for a few seconds and then back to "filter". This solves the pressure problem but a dark cloud of junk shoots right back into the pool for about 10 seconds.... anyone tell me where I'm going wrong? Thanks... 18' AGP with the BBB.