I haven't checked my mixed water, I will do that. My Alk and CA stays solid. It was going down, CA 420 to 380 and ALK 9 to 7. Then I started using kalk and CA stays at 400 ALK goes from 9 to 8 in between weekly 4 gallon water changes in a 20 gallon tank.
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Get a life!
Current Tank Info: 20gL mixed reef, 10g mixed reef w/nem & clown, 5g NPS & harlequin
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