I have a 75g tank that had a piece of bubble algae develop from a frag. I pulled it off and thought I cleaned it, but now I can see small clumps growing all over my rock work. I put in 2 emerald crabs, but at the rate I see them moving around I don’t see them making a huge dent. Water change is tomorrow and I will pick off all I can see. Once you have it do you ever get rid of it without chemicals? What is the recommended way to get rid of it?