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bertoni · 02/15/2018, 10:31 PM

Hmm, my response seems to have disappeared. Maybe I didn't hit the right button.

Have you measured some freshly-mixed saltwater? Maybe the mix is bad. I'd also test the RO/DI, just on general principles. It should measure 0 dKH. A saltwater kit will be somewhat inaccurate on RO/DI, but it'd be more than good enough.

02/15/2018, 10:31 PM	#36
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Hmm, my response seems to have disappeared. Maybe I didn't hit the right button. Have you measured some freshly-mixed saltwater? Maybe the mix is bad. I'd also test the RO/DI, just on general principles. It should measure 0 dKH. A saltwater kit will be somewhat inaccurate on RO/DI, but it'd be more than good enough. __________________ Jonathan Bertoni