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Total Water Hardness Test Kit Total Water Hardness Test Kit Total Water Hardness Test Kit Total Water Hardness Test Kit
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Poolweb #R151276

Total Water Hardness Test Kit

5 (4)
Allow 3-6 Weeks to Ship
$23.57 $23.57 & express shipping discount!
Unit price per 

More information

This item is not currently in stock, but we can order it directly from the manufacturer for you. They have informed us that this product could have an extended or unknown lead time due to a nationwide manufacturing backlog of swimming pool products.

Unfortunately all companies are facing the same issue at present time, but our direct relationships with manufacturers helps to reduce the lead time to as short as possible.

We will do our best to get your order to you as quickly as possible and will update you with shipping dates as soon as they are provided to us by the manufacturer.

Shipping Options (more)

  • Standard Shipping, $6.95 Get it by
  • 2 Day Shipping, Get it by
  • 1 Day Shipping, Get it by

Shopper Protection

Replacement Parts

Specialty Test Kits

Our Specialty Kits typically focus on measuring one type of chemical and are useful when you only need to test one special factor like hydrogen peroxide or phosphates.

Color-Matching Kits

Our specialty color-matching test kits and drop-count titrations give straightforward answers. They are available with 3/4 or 2 ounce reagents.

Ideal Hardness Levels

The ideal calcium hardness in pools should be between 200-400 ppm and spas 150-250 ppm. If your pool falls below 150 ppm, you should adjust your hardness level.

Product Information


This is a Pentair Rainbow #1200 Specialty Test Kit for Total Water Hardness using a drop test and visual method. Testing parameter indicates total hardness in PPM or grains. The reagents in this kit are 1/2 and 1 ounce. This kit comes in a compact box with instructions.

Calcium hardness is a necessary component in pool water because it helps prevent leaching out of certain substances in pool equipment. It works in conjunction with alkalinity and pH. You would balance alkalinity, pH, then calcium hardness in your pool, in that order. That is because adjusting alkalinity often affects pH. Adjusting both alkalinity and pH often affects your calcium hardness.

Product Features

  • Tests for Water Hardness
  • Reagents are 1/2 and 1 ounce
  • Reagents: Solution No. 6 and Solution No. 7

Instructions for Total Water Hardness Specialty Test

1. Fill plastic vial to bottom line with water sample from pool or spa.

2. Add 2 drops of solution #6 to water sample, swirl to mix.

3. Carefully add solution #7 one drop at a time. Swirl vial between drops to mix, counting the number of drops it takes the red color to change to pure blue.

4. Each drop of solution #7 that it takes to turn the red color to blue equals 50 ppm of hardness.

Follow product instructions included with the kit.

Technical Specifications

Product CategorySpecialty Test Kits
Poolweb Item #R151276
Cross Reference #Rainbow #1200
Shipping Weight0.8 lb

Shipping & Returns

Shipping Options

Ship MethodCost
Standard Shipping $6.95 Get it by
2 Day ShippingGet it by
1 Day ShippingGet it by

Standard ground shipments may be delivered sooner depending on where you are located, and the shipping method used to ship your order. Combining multiple items onto the same order can change the delivery date and expedited shipping costs, especially if the other items are not available for immediate shipment. Transit time is calculated in business days and does not include Saturday and Sunday.

Return Policy

This item can be returned within 30 days of order. See return policy for details and how to place a return.

Poolweb Guarantee

This item qualifies for a one-year guarantee. Poolweb guarantees that the item you receive will function as advertised for one year. See the Poolweb Guarantee for more details.

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