SPS problem seriatopora,stylophora

[Greg11]

Thanks,I ll try everything you guys suggested, I was thinking its some kind of bacteria but who knows..

 

[Chris Lakies]

Ive found that these type of corals (for me) dont like PAR over 300. My ponape bird does best around 200 par.

 

[a.browning]

I had this same issue and it ended up being potassium. It tested at 310 and is now at 400, and everything is looking good again.