Jamie, this is the second time I have had an acro do this. The first time I fed nothing other than what the fish required. I did not notice any growth at all for the months they were white. I did notice polyp extension regularly. One thing I do fairly often is blast my rocks with a baster. I know this produces a lot of food because my green brain fully extneds it's feeding tentacles within seconds! Perhaps the "dust" contains appropriate food for SPS....
On the first bleached acro, I saw accelerated growth once the zoox had fully repopulated. It was a tiny 1" frag 9 months ago and is now a baseball sized colony.
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Brad
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