Myka
Catherine is a very experienced reefer. enough said about that. It is strange only your SPS's are affected. I would have expected your clams to be affected too. When I saw the tank there was plenty of flow and sps polyps were waving in the current. It might be the carbon your running or phosphate media that is causing your problem. Did you try ozone yet ? What is the redox level of your tank. SPS seem to repond very well to high redox levels,
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