HI761 Total Chlorine ULR checker misc Add to this 1 level

Add to this 1 level spoon of the NO2 powder

Applicator plus plastic control flow tip which helps to eliminate spillage and increase feeding accuracy included with every order

IQ-Fill – Water run-time intelligence

If the color corresponds to a value lower than 10mg/L nitrate then it might be better to compare colors as shown for the low range (see below)

natural aquarium in minutes

HI761 Total Chlorine ULR checker misc Add to this 1 levelThe Hanna Checker bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give 5 to 10 points resolution while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The Checker is both accurate and affordable. Range 0 to 500 ppb Resolution 1 ppb Accuracy (@25C 77F) 5ppb 5% of reading Measurement Method Colorimetric