What is the acceptable range for GH KH

1percula

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in a Reef Tank? I had to pull my fish because of an Ich run and put them in another tank. Needless to say, I missed the water changes and dosing on my main tank during the treatment period. I used to change 10%-15% of the water every week or every other week.

I noticed some of my corals are looking like they used to (Hammer, Frogspawn and Candy coral). The calcium is 440 ppm, PH is 8.2, salinity is 1.025, but my GH/KH has gone from 179 ppm to 126 ppm. I know the quick answer is to do the water change, but I can't seem to find definitive figures on what the GH and KH should look like.
 
ppm/50 = meql

meql x 2.8 =dKH

I shoot for 9 with my dKH, so you can calculate back and figure that's 3.2 meql = 160ppm
 
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