I was given 2 skkimmmers, the first one isnt working out that great so I tried the Prizm. Seemed to work fine in a tub I made to check it out. Then I out it in the tank and all of a sudden the water intake just started to suck up so much water it was overflowing. I changed the gauge on the inlet so it would only take so much water but it still was happening. Any suggestions?