Quote:
Originally Posted by cdearing
I didn't have a spare light so put a large plant growing light fixture over the tank for about 5 days while I waited for my new lights on the slow boat..... Also the sand has a weird texture like reddish hard layer over the top.
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Sounds like the grow light fueled a bacterial or cyano outbreak. It would have been better to lights out for 5 days, than place a grow light (just my opinion.)
I would lights out for minimum 3 days, and slowly ramp them up over 2 weeks. Give your corals a chance to recover and allow your water column to resolve your bacterial issues.