To me there are three things to look out for when you suspect growth is sub-par:
1) low alkalinity
2) nitrates and/or phosphates present
3) presence of competing species that participate in allelopathic inhibition. Macro algaes (e.g., caulerpa) and soft corals would be suspect.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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