If you use HW Marinemix Reefer - can you test something?

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hllb

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I’m having issues w my Apex ph monitor reading low. Can anyone mix fresh saltwater w hw Marinemix reefer, mixed to 35 ppt, and test their ph for me? My salifert test said 8.4 or 8.5 and the apex probe said 8.16 - which is about how low the probe is reading in my tank. So curious what your ph your fresh salt has.
 
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