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I guess those white growth tips are my best clue as to the health of my corals, unless one day/night I happen to see a spawn event occur in my tank.
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growth is a good one for sure although I have seen, them growing on one end and dieing on the other at the same time, lol. A few years ago I went to aan all radium lighting arrangement (all 400 watt 20K's) I loved the look of the tank and my acro coloration was just beautiful.... I was a happy puppy. As time passed by, I began to notice that my growth rates had severly decreased, I would guess by around 75%. I then began to notice that alot of them were forming larger and larger bleaching areas lower and on the underside of branches. Even though I loved the colors of the corals I changed my lighting back to its original configuration (mix of 20K radiums and 10K Ushio) , the color is still very good (not as intence as it was ) but the corals have once again began to show great growth and the bleached areas have repopulated.
Mike