I am on my first and last pail. I mixed it before using any. I thought I did a good job with that. I never tested the water when I started with this salt. Now at the end of the pail I tested the new mix and got a 540 calcium with Hanna Checker. I checked the mix only because I got an over 600 on display tank with the Hanna Checker. I have not been dosing Calcium. I am switching back to Reefers Best, and will watch more closely.
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