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Their prices are excellent, customer service also superb. The return policy is unusual, we have often been told to donate the unwanted item to a local shelter. Nice.

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API Freshwater Hardness GH & KH Test Kit

API Freshwater Hardness GH & KH Test Kit

API Freshwater Hardness GH & KH Test Kit

  • Tests tap water & freshwater aquariums for general hardness (GH) and carbonate hardness (KH).
  • Helps prevent fish stress caused by rapid pH shifts, the result of low levels of KH.
  • Box of one test kit