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It slowly releases small amounts of a stabilized oxygen-chlorine combination which
along with regular water changes with a high quality salt
A more economical version suitable for a one time major correction is the Salifert Magnesium-powder
sludge can lead to unsightly algae growth
HI758-11 Hanna Instruments HI758-11 Marine Calcium Checker® HC Calibration Check Set dosing additives It slowly releases small amountsThe Marine Calcium Checker HC Calibration Check Set HI758 11 provides a simple solution to validating the Marine Calcium Checker HC HI758 that has a range of 200 to 600 ppm calcium. This high quality set of standards is manufactured in our state of the art facility and comes supplied with a Certificate of Analysis. The Certificate of Analysis provides the lot number, reference values and expiration date for traceability when certifying the CheckerHC.
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