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phillips
Guest
is 450mg/1 calcium ok
reefnut
Active Member
I'm not sure what unit of measure you're referring to but 450ppm calcium is good if you have a alkalinity level of 12.6dkh or so... but IMO that's running on the high side. Personally I'd shoot for somewhere around 420ppm to 440ppm calcium with 8.4dkh to 11.2dkh alkalinity. Pick a spot and try to keep it as consistent as possible.