Randy Holmes-Farley
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My Tank Thread
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I’ve got a question that I’m frustrated with.
I’m dosing kalk and doing 2 tsp per gl of RODI.
I’m checking potency with an HM Digital 100 using mS. I calibrated the mS with HM Digital solution.
I use the brs 1gl space saver and dose 480ml a day and still need to supplement 2 part.
I found this thread and have made 4 different 1gl solutions, starting from scratch on each. 1st, 2 tsp of brs kalk
2nd, 3 tsb of kalk
3rd, 4 tsb of kalk
4th, 6 tsb of kalk… all are under 7.14mS. Each jumps up about 1.0mS
I did 2 different batches of 1 cup RODI & 2 tsp of kalk, I just mixed differently. One by hand for 30sec or so and the 2nd on a magnetic stirrer for 20min. Magnetic stirrer was 7.12mS and the 30 sec hand mix was about 5.2
How do I achieve 10+mS or 12+ PH per gl?
That meter maxes out at 9.99 mS/cm so will never read higher.
It sounds to me like your meter is just off and 7 mS/cm is saturation for you.
what temp are you doing this at? Kalk dissolves less and has lower conductivity at higher temps.