API Freshwater Master Test Kit for Aquarium

This kit uses liquid reagents and glass test tubes to check tap water and aquarium water for the parameters that matter most to freshwater fish. Each test involves adding a water sample to a snap-cap glass tube, mixing in the corresponding reagent drops, and comparing the resulting color against a printed reference chart. The set includes multiple bottles of testing solution, four reusable glass test tubes, a holding tray for storage, and a step-by-step instruction booklet. The reagents are supplied in enough volume for hundreds of individual tests, so the same kit can be used repeatedly over time. Tubes should be rinsed with water immediately after each test so residue does not build up inside them. No batteries, tools, or assembly are needed to begin testing.