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The JED POOL TOOLS 00-232-B is an OTO (orthotolidine) solution used for testing free chlorine levels in pool and spa water. Supplied in a 0.5 oz bottle, this reagent produces a yellow color reaction when added to a water sample, allowing technicians and service pros to read chlorine concentration against a standard comparator. It is a direct-use consumable that fits into established pool water testing routines and requires no special equipment beyond a compatible test kit.
This reagent is suited for residential and light commercial pool and spa maintenance programs. Pool service technicians use OTO solution as part of routine water chemistry checks to verify sanitizer levels before adjusting chemical dosing. The 0.5 oz size is a standard replacement volume for common drop-test kits used in the field.
Designed as a replacement OTO reagent for compatible drop-style pool and spa chlorine test kits that accept standard OTO solution.
Pool service professionals and qualified water treatment technicians should handle chemical reagents according to standard safety practices. Store the solution away from direct sunlight, heat, and incompatible chemicals. Cap the bottle securely after each use to prevent contamination or evaporation. Follow the test kit manufacturer instructions for correct drop count and sample volume.
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