Benchmark Alkalinity Indicator

Replacement alkalinity indicator for the Benchmark Alkalinity Test Kit. 7.5 mL indicator bottle Add 2 drops to a 5.00 mL aquarium-water sample Produces the blue starting colour used for the blue-to-red endpoint One replacement reagent only; titrant and testing tools are not included For best results, use only with the Benchmark Alkalinity Titrant and follow the kit instructions. Best value: Need both reagents? Choose the Alkalinity Refill Reagents. Starting from scratch? Choose the complete Alkalinity Test Kit. For aquarium testing only. Keep out of reach of children and read the product label before use.