Test parameters:
6 in 1: nitrate, nitrite, ph, residual chlorine, total hardness, total alkali.7 in 1: nitrate, nitrite, ph, residual chlorine, total hardness, total alkali, carbonate Features
1. Made of PVE and other materials, safe and environmentally friendly, no pollution. Provides accurate and fast results for any water source, including fresh and salt water swimming pools, spas and hot tubs. 2. Get immediate and reliable results with simple and clear instructions. Just dip it in and compare to the big color chart on the bottle. The ideal range is marked on the bottle. Specification Category: litmus paperMaterial: [...]