Test for total alkalinity with a reliable test kit. The desired range for total alkalinity is 80-140 ppm.

This product increases the effectiveness of the disinfectant, and helps prevent scale formation. It also prevents corrosion of metals, etching of spa surfaces, eliminates “bounce”, and maintains pH at the proper level. Easy to use; dissolves quickly.

1. Add 1 oz. (2 tbsp.) to spa water.
2. Allow water to circulate for 30 minutes.
3. Retest water and repeat Steps 1 and 2 until the desired level is reached. For best results, dissolve granular products first by adding to a small plastic pail filled with water.

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Brand Website Reviews

Customers on the AquaDoc site share mostly positive feedback for the AquaDoc Total Alkalinity Increaser for Hot Tub, saying it helps raise and balance total alkalinity when used as directed, which supports more stable water chemistry and can reduce frequent adjustments in their regular spa care routine. Many reviewers appreciate clear usage instructions and how it fits into weekly maintenance.

Amazon Review Summary

On Amazon, buyers of the AquaDoc Total Alkalinity Increaser note it aids in keeping total alkalinity in the recommended range, helping maintain balanced hot tub water and support smoother water conditions when paired with proper testing and treatments, with overall feedback trending positive.

Walmart Review Summary

At Walmart, reviewers mention that the AquaDoc Total Alkalinity Increaser contributes to steadier overall water balance and can help minimize pH swings in their hot tubs when used as part of routine maintenance, often highlighting it as a useful step in their spa water care process.

Reddit Discussions

In Reddit and hot tub community threads, owners discuss how keeping total alkalinity in the right range helps stabilize pH and makes overall chemical balancing easier, with several users noting that products like the AquaDoc Total Alkalinity Increaser fit well into a regular water care routine to help reduce swings in pH and improve comfort.

Why is alkalinity important for my hot tub or spa?

Alkalinity plays an important role in supporting stable pH levels in your hot tub or spa. Maintaining proper alkalinity helps reduce rapid pH changes, supporting balanced and comfortable water conditions.

How do I use AquaDoc Alkalinity Increaser to adjust my spa's alkalinity?

Follow the directions on the product label for dosing. Add the recommended amount of AquaDoc Alkalinity Increaser to your hot tub or spa water and allow it to circulate for even distribution.

Is AquaDoc Alkalinity Increaser compatible with different hot tub sanitizers and water systems?

Yes. AquaDoc Alkalinity Increaser is formulated for use with a variety of sanitizer types, including chlorine, bromine, and ozone systems. It’s suitable for most common hot tub and spa setups.

How often should I test and adjust the alkalinity in my hot tub or spa?

It’s best to test and adjust alkalinity regularly, particularly after refilling your spa. Aim to keep total alkalinity within the recommended range to help maintain balanced water chemistry.

Is this product compatible with Baquacil?

Yes. This Alkalinity Increaser is compatible with Baquacil and can help support stable water balance when used as directed.