R-0011L-C | Taylor Calcium Indicator Liquid | 2 oz.

The Taylor R-0011L-C Calcium Indicator Liquid (2 oz) is a precision reagent used in Taylor water-test kits to trigger the final color change in the calcium hardness testing sequence. Designed to work alongside reagents R-0010 (Calcium Buffer) and R-0012-A (Hardness Reagent), it enables homeowners and professionals to accurately measure calcium levels in pool or spa water and maintain optimal water balance. Supplied in a compact dropper bottle format, this indicator ensures consistent test results when replacing your reagent kit’s component and supports effective management of scaling or corrosion risks in your aquatic system.

Highlights

• Precise Indicator Function: Performs the final step in calcium hardness testing when used with Taylor test kits—essential for accurate measurement.

• 2 oz Dropper-Bottle Format: Compact size is ideal for annual refresh of your test kit reagents and convenient storage.

• Test Kit Compatibility: Specifically formulated for use in Taylor test kits referencing R-0011L, ensuring method-matched accuracy.

• Protects Pool System Integrity: Helps identify proper calcium levels, preventing scaling of surfaces or corrosion of equipment.

• Stable Performance with Proper Storage: Designed to remain effective when stored between 36°-85 °F, away from direct sunlight and strong chemical exposure.

Additional Info

If you are replacing the Taylor R-0011L-C Calcium Indicator Liquid (2 oz) in your hardness testing kit, this guide explains how it works, which Taylor kits it fits, and how to use it safely. It also covers how this indicator interacts with R-0010 and R-0012-A to complete the calcium hardness test before you buy in store.

How the R-0011L-C Indicator Works in Taylor Hardness Testing

The R-0011L-C indicator starts the color reaction needed to measure calcium hardness accurately. When used with reagents R-0010 and R-0012-A, it produces the clear tint shift that signifies the hardness endpoint in your pool or spa water sample.

How many drops of R-0011L-C are typically needed to begin the color reaction

Does this 2 oz size work with Taylor kits that already use R-0011L indicators

Can I buy the R-0011L-C indicator in store for same-day replacement

What color should my sample turn before adding the titrant step

Can I bring my Taylor kit to confirm the correct indicator size

Proper Handling and Storage of the Indicator

This indicator performs best when kept between 36°–85°F and stored upright away from direct chemical fumes. Proper storage helps maintain stable accuracy during regular testing.

How long a 2 oz bottle of R-0011L-C typically lasts for weekly testing

Is indoor storage recommended over keeping it in a hot equipment area

Whether the indicator can be stored near chlorine or acid bottles

What to do if indicator solution spills during water testing

Does Discount Pool Mart offer storage cases for Taylor test reagents

Improving Water Balance with Accurate Hardness Readings

Accurate hardness testing protects surfaces, heaters, and plaster from scaling or corrosion. Using a fresh indicator ensures each titration endpoint is true and easy to interpret.

How often to test hardness for a standard in-ground pool

How to use R-0011L-C results to fine-tune hardness levels

Whether all three hardness reagents are available in store together

How to identify the proper hardness range for plaster pools

How to know if old indicators are giving inaccurate color shifts