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I don't know if pH affects the color of the corals but for some reason most of the SPS I got losses color after two or three weeks they are in my tank especially blue or purple colos. I know not enough light also causes corals to lose colors but I don't think this is my case.
Good question John and same here, it bothers me seeing on my Reefkeeper a pH 7.89 and in less than 8 hours dropped to pH 7.62.
Yesterday was the first time I've seen my pH at 8.03 but I had all the windows open.
John I've been having the same pH problem with my tank, I'm dosing the DIY 2 part Alk & Cal. I dose Cal when the lights are on and Alk when the lights are off.
last night my pH was 7.86 @ 10:00 and this morning pH was 7.64 @ 6:45.....Rob was telling me about how stables his parameters has became...
Tank is 12 weeks old today and everything is doing very well, I'm trying to keep up with the weekly 10 to 15% water change.
Since I setup the tank the new additions are:
Trio Lyretail Anthias, Rainbow Bubble Tip and Rose Bubble Tip Anemones, pair of False Perculas Clownfish and a mini colony...