Residential Chlorine Water Maintenance Manual

To keep your Plunge water safe and clean in a residential environment, see below for a protocol we recommend. This is a protocol that we’ve seen work well for most situations. Please keep in mind that water chemistry can be different based on the quality of your water in your county. If you are on well water, please make sure you have the ability to properly reduce calcium levels before filling the tub. High amounts of calcium can damage the pump over time. These water maintenance instructions are meant to be used alongside the regular maintenance protocols for your Plunge. For more guidance, please email support@plunge.com.

Standard size tubs:

• The Plunge (Std)
• Plunge Pop Up
• Plunge Pod
• Freeze to Death Cold Plunge

XL size tubs:

• The Plunge XL
• Plunge All-In
• Plunge Evolve XL
• Plunge Air

Products needed:

• Sirona Chlorinating Granules (Chlorine) - Fast-dissolving chlorine sanitizer and shock. Raises free chlorine.
• Sirona Spa Down - Decreases pH and alkalinity
• Sirona Spa Up (optional)* - Increases pH and alkalinity
• Sirona Clarifier (optional)* - Coagulates organic material (sweat, deodorant, detergent, etc.) to filter out.
• Chlorine Test Strips - Measure free chlorine, pH, alkalinity, and total hardness.

*Sirona Spa Up and Sirona Clarifier are not included in the starter kit, but are available for purchase at plunge.com/collections/supplies if needed.

Sirona Replenish (liquid chlorine) has been discontinued. If you still have Replenish, finish it before you start the Chlorinating Granules. The Replenish amounts are: 0 - 1 PPM, add 2 teaspoons of Replenish; 2 PPM, add 1 teaspoon; 3 - 5 PPM, leave as is; over 5 PPM, add fresh water.

(!) Never mix Replenish and Chlorinating Granules together outside the water. Add one product at a time, straight into the water.

Key:

• Tbsp = tablespoon
• Tsp = teaspoon

(!) This protocol should be used after every drain and refill.

(!) For best results, wait 15 minutes between adding each chemical.

First steps:

Standard size tub protocol

1. Fill your Plunge with fresh water.
2. Use the Sirona test strips to determine Alk and pH, then follow the instructions in the tables below.
3. Test free chlorine and add Sirona Chlorinating Granules by the Chlorine table below (0 PPM: 2 Tsp; 1 or 2 PPM: 1 Tsp), then wait 1 hour and retest.

XL size tub protocol

1. Fill your Plunge with fresh water.
2. Use the Sirona test strips to determine Alk and pH, then follow the instructions in the tables below.
3. Test free chlorine and add Sirona Chlorinating Granules by the Chlorine table below (0 PPM: 2 Tsp; 1 or 2 PPM: 1 Tsp), then wait 1 hour and retest.

Every 2 days:

1. Test free chlorine, pH and alkalinity with the test strips and adjust based on the tables below. Balance pH and alkalinity first: a free chlorine reading is only right once they are in range.
2. Add Sirona Chlorinating Granules as the Chlorine table says. In normal use that is 1 Tsp every 2 days, to hold 3 - 5 PPM free chlorine.

Weekly:

1. A water line may naturally accumulate over time. Wipe the water line with a sponge as needed.
2. Clean any hair and debris off of the drainer strainers.
3. For additional maintenance instructions please visit our Help Center.

Standard size tub tables

Chlorine table

pH table

Alkalinity table

XL size tub tables

Chlorine table

pH table

Alkalinity table

Last revised: November 11, 2026