I just installed my 1st skimmer into my 55 gal. tank...The skimmer is a CPR Bak-Pak Dual pak...I have it running for about a day..But i stopped it due to the collection cups..They have filled up with clear water..In about 4 hours I have about 5 gals of water that I have dumped out of the collections cups..My salinity has gone down from 1.024 to 1.022..I was told that adding new salt sometimes makes it foam more..I havent added and chemicals to the tank in a few days..I heard this is normal..Or is it?