Those Zoas are not brown but actually red with yellow spots, either they morphed or there were Zoas that you didn't see before, I wouldn't be too concerned. And Zoas do morph all the time.....
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Always looking for the next best coral...
90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips
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