I lost my tank not long ago to a case of brook. I also had a fair bit of algae in my tank as well. When I started my tank over I put my live rock and stars, crabs, conchs and snails into a tank I had here and took out 90 percent of my water (I also switched from cc to sand) then refilled the tank and let it run. Once the tank had cleared from the sand I put all my snails etc back in. Not right away but about 2 weeks after the tank never actually cycled again as I still had the bacteria in the pump and of course the original live rock went back into the tank. I still have 4 blue damsels in qt tank. I was told to let my tank run fish free for 3 weeks which I am doing. It took alot of scrubbing to get the old algae off the tank before I drained the tank. The live rock from the tank also had a lot of algae on it so I just sort of rubbed off what I could and then let the snails do the rest. I have alot of snails in my tank and they did a great job of cleaning off the remaining algae from the rocks. I used to have alot of red algae in my tank but now it is all green and not even a quarter as bad as it was and the snails and rest of the cleaning crew is keeping up with it very nicely. This is just what I did of course. To be on the safe side for the brook I am going to wait another couple of weeks yet just to be safe. Not sure if this helps you or not
