GH+ Control
GH+ Control In good pond water the carbonate hardness (KH) is considerably lower than the general hardness (GH). So use GH+ mainly if the GH is at approximately the same value as or lower than the KH.The ideal GH value for pond water is between 8° and 12°. As a rule of thumb, the GH value should be approximately 1.2x the KH value (e.g. with KH = 7°, GH should be 8.4°).





