Did you wash your water change buckets recently?

How much sand did u add to the fuge? Was there existing sand there already? If you covered the old sand you might havd "suffacated" it and caused the organisms in it to die off. Just a thought, just a guess actually

tristan

Check the alk of your new SW.

not good to have a melt down my sailfin tang is not doing good in the new tank woried I starting a melt down too.... good luck David
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