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Old 02/22/2018, 07:23 AM   #3
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Join Date: Oct 2013
Location: Pittsburgh, PA
Posts: 382
Originally Posted by oldhead View Post
I wouldn't think your water change is effecting your kh much unless you are changing more than 50% of the water volume. Maybe something like a .2 or .3 rise.
I wouldn't have thought so either..... but i tested about a 1dkh difference yesterday before and after. 8.3 to 9 or so borderline scares me with all the sps I have. I'm changing about 16 gallons on a 65 or 70 total volume system weekly.

(70-16)8.3 + (16 11)/70 = 8.91dkh

I'm just concerned full amt. dosing of 2 part on WC days will cause my alk to keep climbing week to week unless i adjust for it somehow.

65 gallon mixed reef
Good maintainence and husbandry is a cumulative effect, not a single event.
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