Read the link ragin attached.I just finished my third wc in 3 days no change as of yet, what's the best way to deal with this bloom
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Vacuum substrate thoroughly, look for and remove any dead fish, or any dead or decaying plants. Reduce feeding. Wait. The bloom will not hurt the fish but if you don't remove the cause or in fact add to it (by feeding more), the bacteria in the water column can starve out the BB.
Basically, you may have some sort of husbandry issue...no worries though. Correct it and don't repeat.