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Disappearing Calcium or Bogus Test kit?

April 26, 2017bogus calcium disappearing kit Test

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Disappearing Calcium or Bogus Test kit?

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Guys, The recurring calcium question. I have a 100gal FO tank with ~400watts of VHO lighting. I want to add more zooxanthellae and SPS in the future. At this juncture I want to control the alkalinity and calcium before taking the next step. I am using ESV’s 2 part solution and my current readings are 13 dKH and 200ppm. I starting by adding the manufacturers recommended amounts and didn’t reach anywhere near 400ppm Ca; I never exceeded 200 ppm.