API GH and KH Test Kit - Aquaponics For Life

API GH and KH Test Kit

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Product Description


Tests aquaponic water for general hardness (GH) and carbonate hardness (KH). Helps detect stress on fish caused by rapid pH shifts, which result from low KH levels and helps aquarists duplicate the natural habitat of their fish. In aquaponic systems we want to maintain a KH of at least 4º and it is safe to go as high as 18º. Use AquaBuffer to increase the KH levels in your system.

GH & KH RangeAquarium Life 0º – 3º
(0-50 ppm)Discus, Arowana, Elephantnose,
Neons, Cardinals, Live Plants

3º – 6º
(50-100 ppm)Most tropical fish including
Angelfish, Cichlids, Tetras, Tilapia, Live Plants

6º – 11º
(100-200 ppm)Most tropical fish including
Swordtails, Guppies, Mollies, Goldfish

8º – 12º
(140-200 ppm)Marine fish and invertebrates