hey everybody, i am having wierd algea problems. i have a new 28 gal. fish tank with two fishes and 3 snails. on my sand and now on the glass i have some copper color spots every where, and they are increasing. someone told me that it is because of the quearz in the sand and within 6 weeks it should go away when the quartz from the sand runs out. is this correct? also i have some live rock and now near it is growing a grey colored patch, which was small and beginning to get bigger. it has some hairs growing off of it, which are getting bigger, is it because of the live rock and will it go away or what will make it go away, the snails are not eating it, will the shrimp eat it? please help, thanx.