SPS almost always get more PE at night but if you are getting very little in the day you may have something that is pecking or disturbing them in the day. An observation is in the wild there are less polyp nipping pests at night so the corals protrude more PE then when it's safe to do so which is at night.
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Greg
Last edited by Snappy; 06-25-2008 at 03:53 AM.
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