Long-lasting, continuous monitor measures aquarium pH level for 3 to 6 months. Redesigned sensor technology allows "at-a-glance" pH readings from 5.8 to 8.2. Simply match pH sensor dot to corresponding color wheel for aquarium peace-of-mind. This pH range is perfect for most freshwater aquariums from soft water, Amazonian to hard water, Rift Lake cichlid environments. Paper-thin pH monitor measures only 1-1/2" x 2-1/2" high for convenient and discreet placement anywhere inside your aquarium.For freshwater aquariums only.
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