Ensure safe and sanitary pool or spa water with the ProAqua OTO Test Reagent. This 20ml bottle contains orthotolidine (OTO) solution, used to measure chlorine and bromine levels in water—key indicators for effective sanitization.
Compatible with most standard residential water test kits, this reagent offers clear and reliable results for routine water testing. Whether you're maintaining a spa, hot tub, or swimming pool, the ProAqua OTO reagent makes it easy to monitor sanitizer levels and keep water crystal clear and safe for use.
