General Hardness (gH) Test Kit 0.5oz 15ml

$7.34

SKU: SER462

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Details

Makes it easy to monitor the total hardness. For approx. 420°dGH. In case of too low GH values we recommend sera mineral salt. High total hardness levels can be lowered by mixing in R/O water. For creating soft water we recommend adding sera blackwater aquatan or filtering through sera super peat.