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 | Freshwater GH and KH Test KitTests tap water and freshwater aquariums 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 Customers Also Purchased: |  | ||||
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Freshwater GH and KH Test KitCopyright 2008 Pawsuppetsupply. All rights reserved. | ||