Is It Good To ?

David James

Reefing newb
I have a 72 bow front with about 70 lbs of live rock. I notice that there is extra growth of algae on the side of the tank where the sunlight from the windows of my apartment comes in. I wanted to know is it all right to clean my rocks with a brush within my next water change? I was thinking also to get a background for the back and the side of the tank to block some of the sunlight.
 
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