Just a side note. Don't mix up your sand, ever. Your sand will have layers of bacteria in it...the stuff that is under the sand needs to stay there! If you get algea, then work out a solution through another method. Don't ever stick your hand in there and start swirling the sand around. The algea blooms will come and go as you get through your cycle. Just be patient. Running your lights a little less will probably also aid in keeping the algea at bay.