Seachem PH Alert (3 Pack)
$21.98
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No chemicals or test procedures required Continuously monitor pH levels in freshwater aquariums or filters Each device lasts up to 6 months, 4 times as long as competing products A sensor changes color reversibly from yellow to orange to red alerting you to shifts in aquarium pH levels between 5.4 and 8.0 *All Affiliate products are purchased on Amazon
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