OTO-Phenol Red Refill – Reagent Set for Pool and Spa Water Test

Extend the use of your analysis kit with the OTO-Phenol Red refill, designed to effectively test the chlorine and pH of your pool or spa water.

Essential for regular maintenance, this reagent set allows you to keep water balanced, clear, and safe throughout the season.

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Why choose the OTO-Phenol Red refill?

Chlorine control
The OTO solution allows measurement of total chlorine to ensure proper disinfection.

Accurate pH measurement
The Phenol Red solution indicates the pH level to maintain the ideal balance (7.2 to 7.6).

Compatible with standard kits
Suitable for most manual test modules for pools and spas.

Convenient size
Ideal for replacing used reagents without having to buy a complete kit.

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Contents of the set

1 bottle OTO (chlorine test)
1 bottle Phenol Red (pH test)

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Ideal for:

In-ground and above-ground pools
Spas and whirlpool baths
Residential maintenance
Replacement reagents for analysis kit

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With the OTO-Phenol Red refill, ensure precise monitoring of chlorine and pH for water that is always clean, balanced, and pleasant for swimming.