Benchmark Magnesium Indicator

Replacement magnesium indicator for the Benchmark Calcium & Magnesium Test Kit. 7.5 mL indicator bottle Add 2 drops after the magnesium buffer Creates the wine-red starting colour used for the pure-blue endpoint One replacement reagent only; buffer, titrant and testing tools are not included Protect from light and use only as directed with the Benchmark Magnesium Buffer and Magnesium Titrant. Best value: Need every calcium and magnesium reagent? Choose the Calcium & Magnesium Refill Reagents. Need the tools too? Choose the complete test kit. For aquarium testing only. Keep out of reach of children and read the product label before use.