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CTValley Bio > Aquaria & Terraria >

Water Testers

Checker® (pH Checker)

Hanna. At the cost of a few rolls of pH litmus paper, you ...

Replacement Electrode for the Checker®

Screw-in type. Fits AP 72 Checker 1 pH Testers. Has automatic temperature compensation ...

Seachem Ammonia Alert

An easy to use device that monitors free ammonia concentration in the aquarium. ...