I have roughly a softball size birdsnest colony that had some parts bleach out on me but are now starting to come back and the colony is actually thriving showing a lot of new growth. However, on the bottom/underside of the colony Im starting to get GHA. Typically I have seen this on dead parts but Im actually seeing it show up in areas that have good coloration and growth. Is there anyway to keep the colony intact and get rid of the GHA? Can SPS be dipped in H2o2?