by AquaChek
Buy new: $24.00
(Visit the Best Sellers in Test Strips list for authoritative information on this product's current rank.)
AquaChek Iron measures Total Iron, which includes ferric (Fe3+) as well as ferrous (Fe2+) forms. Some companies sell test strips that measure only the ferrous form of iron, whereas ferric iron is actually more common in pool and spa water
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