Synthetic Rock Leaching Alkalinity & Soaking up Calcium?

samba_dad

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I have a fish-only tank currently and I purchased a Neptune Trident. I thought it was malfunctioning until I confirmed the measurements with a 3rd party test kit. I use Aquaforest Reef Mix salt with RO/DI water. I also used the Aquaforest synthetic rock. The Aquaforest salt is supposed to mix to 7.7-8.3 Alk, 440-460 Cal, 1360-1420 Mag. The Neptune was providing an Alk out of range error. When I tested with my Hannah kit it read 15.7 dKH. The Calcium is around 100 ppm (maybe lower). Has anyone experienced anything like this with synthetic reef rock?
 

ReefStable

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Honestly, I think the salt was likely not mixed consistently in the box.

What's the rock made from? It's possible, but unlikely unless it is from a stone like lime that is dissolving.
 

Pistondog

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You can check the aquaforest batch for icp results, code number on bag.. I use their reef salt and have not had the problems you describe.
 

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