Seachem pH Checker

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Monitors pH solution in aquarium Easy-to-read color changing indicator solution included Recommended for planted aquaria with CO2 injection systems The pH checker is a glass pH mon itor that comes with pH sensitive indicator solution. (For refills, see our CO2 Indicator Solution). When submerged in water, this indicator solution changes color according to changes in the pH of the aquarium as a result of CO2 gas. The pH checker makes monitoring CO2 concentrations and pH level in planted aquaria easy. Suction cup included. Show more