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duke1231
01-21-2007, 05:34 PM
I was wondering how PH and macroalgea with a light source work? When the lights are on in my sump/refugium my chaeto is doing photosynthesis. Now is that also going to raise my PH? Or is that when the lights are off?

Rob
01-21-2007, 08:23 PM
when your lights are on in your display the coral respiration from photosynthesis maintains the PH, then when the lights in the display go out, the PH tends to drop slightly, this is why people then have the fuge lights kick on at night, so the respiration from the macro during photosynthesis can help keep the PH stable during the night

duke1231
01-21-2007, 10:17 PM
AHHHH! Thankyou like usual Rob :) I just put in some chaeto in my sump and bought the little 9" coralife PC to go over my 12x12x20 sump.