I just tested another freshly mixed 27gal trash can of new IO and RO/DI today.
1.026 (refractometer)
Ca 460ppm (elos)
KH 4.5 meq/l (seachem)
Mg 1200ppm (elos)
Either Instant Ocean has really increased the calcium in their salt or my test kit is faulty. The expireation date on it says 12 - 10 so I guess its good until December of this year. I also tested twice because I didnt believe it the first time.
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