Aquaforest probiotic method

[Jordon]

Originally Posted by spedly

Thanks Jordon. I should have been more clear. Up until two weeks ago I had only used RO/DI water for calibration. But I am using American Marine Pinpoint calibration fluid now. I'm measuring 1.025 salinity now (up from 1.021) but am still measuring lower than expected calcium levels.

Oh gotcha!

Have you tested both freshly mixed salt water and your tank? I'm at a loss why the Calcium would be so low. Have you tried a different test kit?

I have the Hanna Calcium checker, and always get results all over the place. I think unless the Distilled water is "lab grade" its contaminants can mess up the results.