I have had 2 little spots where this algae has been growing on a birdsnest coral and I can't seem to get it to stop. I pick it off and have increased the flow on it but it just keeps growing back in the same spot. This is a purple polyp birdsnest and it's lost quite a bit of color the past few months with some light changes, but otherwise it's healthy and growing fine.
Here's a pic.
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Here's a pic.
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