My GSP hasn't opened all day. Parameters are fine. Is this common?
yea, no worries. GSP's randomly close up sometimes, nothing to worry about. Sometimes mine will close for a week for no reason, then they're back as good as ever (my colony has been doing this for 5 yrs so I'm not worried).
Now if the question was "how do I kill my GSP's", that would be a lot harder to answer. They are indestructable. Don't worry at all.
Yeah almost as bad as Xenia!!!
Yeah almost as bad as Xenia!!!
Just a thought - have you blown the misc debris off them lately? About once I week I take a pipette and blow the stuff off them, and other corals as well. Even with decent flow they get a thin layer of "dirt" on them.