Hi All, I am starting to get issues with low Alkalinity at 7.8 and Ph. at 7.8 at night and rising to 8.03 daytime, is this going to give me trouble as it seems to on a downward trend, my system is a 5ooltr heavy stocked mixed reef with fish, I am currently dosing ALK at 51ml and calcium 46ml per day, do I need to increase the dosage or will this add to my problem ? everything in the display tank looks ok, I also do a 60ltr water change every 2 weeks without fail,
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- Thread starter PEP12
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Randy Holmes-Farley
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Increasing the dose is the answer to stabilize alk and calcium, and will help a tiny bit with pH. I'd increase the dose of both unless calcium is already above 500 ppm. . . 
