this algae is actually green. dont know why my pic makes it look brown. I have been trying to let it run its course because my water test are fine.I have 3 small fish and a cuc of 10 crabs and 10 snails. Tank is 3 months old. I have 6 pcs of small coral. Not sure what to do. I keep it off the glass and I have done a slight stirring of the sand but it returns. Lights are on about 8 hr a day. I do a small feeding daily for the fish and a frozen food every three days. Should I continue feeding as usual? Thanks for your replies.