Review on Seachem pH Alert: Long-lasting Freshwater Monitoring Devices (Pack of 3) by Anna Jackson

I love the fast checkout process and the reliability they offer. Running tanks for 3 different types makes it easy to get a quick view between monthly tests with the API liquid test kit. Must be. Remember that they need to be replaced. I personally keep a few on hand for all my aquariums, and like the batteries in your smoke detector, which you need to change twice a year during the summertime (spring and fall), I replace both of my batteries at that time.