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API GH & KH Test Kit

When keeping freshwater fish and plants, the General Hardness (GH) and Carbonate Hardness (KH) of aquarium water should .
$14.95
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Dependable API 5
By Ken Rooke on
I am a firm believer in knowing my water parameters and this is included in my arsenal along with the Master Freshwater kit. I dare you to find this cheaper anywhere else.
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