Adjusting Ph

[wickedfrags]

You bet - the light on the fuge should be on when the lights on the main tank are off to help stabilize pH, known as reverse-daylight lighting (to promote photosynthesis when the main lights are off).

Originally Posted by Koresample

I have a light on my fuge that is on during the day (12 hrs on/12 hrs off). Are you saying that this should be reversed and have it on at night and off during the day?
I have kept a log book since starting the tank, and my Ph has been 7.8 now for over 2 months. Actually, since switching to DD salt as opposed to Instant Ocean, most of my parameters have been pretty stable with my Mg and Ca only fluctuating slightly (i do have a light load of Corals and inverts though).