- Joined
- Sep 19, 2015
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Hi everyone. I have the following situation. I test with Hanna checker and alk is 6.5. With Red Sea it’s 8 dKH. Hanna calcium is 570 and 420 with Red Sea. This is consistent over 2 month period. New reagents from Amazon. Expiration date is good. Is this typical and which result do I follow? Thanks