In late summer I noticed little patches of BA popping up around my tank, and while I tried to remove what I could, a lot of small pieces were growing around the bases of my softies, so I didn't want to hurt the coral trying to remove it. I went off to college and in October my parents who were caring for the tank mentioned that the BA was starting to get pretty bad so I had them start changing the fleece out weekly and we added 2 emerald crabs to the system, while we tried scraping off what we could during water changes. After I got back from college though it became apparent that there was a biblical infestation of BA in the tank; literally just about every surface was coated in it. The tank is fed pretty lightly and tests revealed undetectable phosphate and <5 PPM nitrate, so I'm guessing that the algae is just using up all the organics as soon as they enter the water. I started dosing Microbacter Clean but 2 weeks in and there are no noticeable changes in the amount of algae.