Pool water testkit oto and phenol

This Basic 3-Way Pool & Spa Test Kit is a reliable colorimetric analysis tool designed for daily water maintenance. It utilizes OTO (Orthotolidine) to measure Total Chlorine and Bromine levels, while Phenol Red determines the pH balance. The kit features a dual-chamber comparator block with an integrated color scale for quick and easy visual readings. It provides a simple, cost-effective solution for ensuring pool and spa water remains safe, clear, and chemically balanced. Attached manual in Dutch and French. In blister pack.