Quote:
Originally Posted by Quiet_Ivy
That's not a stupid question at all. You're seeing bubbles because your lights were on longer. Not to get into a big biochemistry discussion, but yes, too long a light period can harm photosynthetic organisms. Will it hurt dinos more than your SPS? I don't know and I *definitely* wouldn't risk pushing the photoperiod too much at once.
hth
ivy
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Personally I'd ditch the UV, it's indiscriminate and you want to increase the competing bacteria etc in the water column. The dinoflagellates would disperse into the water column with a blackout anyway, use the skimmer and siphon to remove them.