---
product_id: 3820077
title: "23225 1/2-Ounce OTO and Phenol Red Replacement Indicator Solutions For Spa and Swimming Pool Water Testing"
brand: "poolmaster"
price: "€ 19.29"
currency: EUR
in_stock: true
reviews_count: 8
category: "Poolmaster"
url: https://www.desertcart.it/products/3820077-23225-1-2-ounce-oto-and-phenol-red-replacement-indicator
store_origin: IT
region: Italy
---

# Compact 1x2.25x3 inch size 0.5 oz precision test solutions Ultra-light 0.01 oz weight 23225 1/2-Ounce OTO and Phenol Red Replacement Indicator Solutions For Spa and Swimming Pool Water Testing

**Brand:** poolmaster
**Price:** € 19.29
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your pool pristine—because your summer vibe deserves precision!

## Quick Answers

- **What is this?** 23225 1/2-Ounce OTO and Phenol Red Replacement Indicator Solutions For Spa and Swimming Pool Water Testing by poolmaster
- **How much does it cost?** € 19.29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/3820077-23225-1-2-ounce-oto-and-phenol-red-replacement-indicator)

## Best For

- poolmaster enthusiasts

## Why This Product

- Trusted poolmaster brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Lightweight:** Easy to store and handle without bulk or weight
- • **Trusted Legacy Since 1958:** Poolmaster quality you can rely on for decades
- • **Cost-Effective Replacement:** Save by refilling, not replacing your entire test kit
- • **Travel-Compliant Packaging:** Sealed #1 solution meets transport regulations hassle-free
- • **Accurate Chlorine & pH Testing:** Stay pool-perfect with precise OTO & Phenol Red indicators

## Overview

Poolmaster 23225 offers 1/2-ounce OTO and Phenol Red indicator solutions designed for accurate chlorine and pH testing in pools and spas. Compact and ultra-lightweight, these replacement solutions help maintain optimal water chemistry without the need to buy a full kit. Trusted since 1958, Poolmaster ensures quality and compliance with sealed packaging for safe transport.

## Description

Product Description For maintaining your pool or spa's water chemistry, Poolmaster's replacement solutions are the perfect choice for testing water. From the Manufacturer Since 1958, Poolmaster has been a leading manufacturer of aftermarket pool and spa products with an unwavering commitment to quality, service and reliability. Poolmaster offers products across six different product lines- Backyard and Decor, Inflatables, Floats, Maintenance, Swim and Dive, and Toys and Games. Poolmaster - We Make Water Fun!

Review: Works great - Very happy to be able to buy replacement solutions instead of having to purchase a whole new kit. I test the pool water frequently and mostly for chlorine and ph levels so I use a lot of these solutions in particular. They are accurate and work well.
Review: Great for testing my swimming pool. - Perfect size and cost. Works great.

## Features

- For maintaining proper water chemistry; Includes 1/2-ounce solutions of OTO and Phenol Red
- OTO tests for the Chlorine Level
- Phenol Red tests the pH level
- (Note: Phenol Red is not the same as Solution #2 Phenol Red - DO NOT interchange)
- Note: The #1 solution is sealed to comply with transportation regulations. No other solutions in this kit require sealed caps.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001E6URGG |
| Best Sellers Rank | #98,254 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #126 in Swimming Pool Water Test Kits |
| Customer Reviews | 4.5 4.5 out of 5 stars (677) |
| Item Weight | 0.01 ounces |
| Item model number | 23225 |
| Manufacturer | Poolmaster |
| Product Dimensions | 1 x 2.25 x 3 inches |

## Product Details

- **Brand:** Poolmaster
- **Manufacturer:** Poolmaster
- **Ph Range:** 6.8-8.2
- **Recommended Uses For Product:** Chlorine Test, Spa, Swimming Pool, pH Test
- **UPC:** 085334232259

## Images

![23225 1/2-Ounce OTO and Phenol Red Replacement Indicator Solutions For Spa and Swimming Pool Water Testing - Image 1](https://m.media-amazon.com/images/I/719IMZgeT4S.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: How many drops do you use of each?**
A: 5 drops of yellow on the chlorine side and 5 drops of red to test the ph level.

**Q: Why might my  22240 Test Kit be reading high for pH at 5 drops? ... and not matching my test strips?**
A: Hi, Thanks for your inquiry.
Typically the strips give you a great quick look at the water chemistry test results, while the liquid test kit may give additional insight to results.
Please call us directly at Poolmaster Customer Service so we can discuss further. Weekdays, 8-4 PST at 800-854-1492

**Q: You add 5 drops to how much water?  Want to test water from refrigrator filter.**
A: I am not certain.  I bought the red and yellow items with a test kit which included the instrument into which you put pool water and then then test liquids.   I apologize, but I live in CA whether we’re are being rained upon. I annoy take a chance because I just returned home from 3 weeks in the hospital.  But look at amazons test kits and they may have the info you seek.

**Q: Why do I need to add 1 drop of #4 before adding 5 drops of #2 to test ph with 5 way test kit but this one you only need to add 5 drops to test ph?**
A: Hi, This particular kit does not include # 4 chlorine neutralizer, but you could use a drop of #4 before testing the Ph in the smaller kit if you wish.
If the chlorine level is high, the #4 solution will help neutralize the chlorine, which helps for the most accurate test.
For more information, you are welcome to contact Poolmaster Customer Service directly, Weekdays, 8-4 PST at 800-854-1492!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by J***A on August 22, 2023*

Very happy to be able to buy replacement solutions instead of having to purchase a whole new kit. I test the pool water frequently and mostly for chlorine and ph levels so I use a lot of these solutions in particular. They are accurate and work well.

### ⭐⭐⭐⭐⭐ Great for testing my swimming pool.
*by W***D on September 17, 2023*

Perfect size and cost. Works great.

### ⭐⭐⭐⭐⭐ As advertized
*by J***Y on June 5, 2025*

Correct chemicals

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-03*