I have just put the 25 lbs of live rock into my 20 long tank. I put 25lbs of live sand in Sunday. When puting in the live rock I noticed that the glass has a coating of gritty feeling stuff.It feels like a little of the sand got mixed into algee and coated the glass. It rubs off easily but puts a " cloud" into the water(very small) Am I ok to put in the Damsel that is acclamating to tempature or am I boned and need to come up with something very quick and $250 that I spent today is lost? Thanks Fred