… The HI781 Checker is a simple, accurate, and cost-effective way to measure nitrate in your saltwater aquarium. Nitrate is a by-product of the Nitrogen cycle. Excessive amounts of nitrates in a reef aquarium can promote the growth of undesirable organisms including algae and…
…The Hanna HI764 Checker HC Handheld Colorimeter for Nitrite ULR bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Hanna…
Alkalinity reagent refills for the easy to use, handheld Hanna Checker HI764 Nitrate Ultra Low Range. Individual reagent packets for 25 tests. Reagent refill for Hanna Checker Nitrite ULR HI764. * Enough reagent for 25 tests.