---
title: "What Is Dichlor? Pool Glossary | Marina Pool Services"
description: "Dichlor is a fast-dissolving granular chlorine that also adds cyanuric acid to the water with each dose."
url: https://marinapool.multisites.ai/glossary/dichlor
publisher: Marina Pool Services
phone: +1-817-896-1120
quote: https://marinapool.multisites.ai/contact
---

Water chemistry

# Dichlor

Dichlor is a fast-dissolving granular chlorine that also adds cyanuric acid to the water with each dose.

Dichlor dissolves quickly, so owners often use it to start up a pool or to shock a small amount of water. Each dose adds both chlorine and [cyanuric acid](https://marinapool.multisites.ai/glossary/cyanuric-acid).

That stabilizer does not leave the water on its own. Repeated use can push levels high, which makes chlorine slow to work. CDC notes that pools using stabilized chlorine such as dichlor need a higher chlorine minimum (it gives 2 ppm for splash pads that use cyanuric acid). If your stabilizer keeps climbing, switch to [liquid chlorine](https://marinapool.multisites.ai/glossary/liquid-chlorine) and consider a [partial drain and refill](https://marinapool.multisites.ai/glossary/partial-drain-and-refill).

[Marina can helpPool Maintenance Services](https://marinapool.multisites.ai/our-services/pool-maintenance-services)

## Related terms

-   [Trichlor](https://marinapool.multisites.ai/glossary/trichlor)
-   [Cyanuric acid](https://marinapool.multisites.ai/glossary/cyanuric-acid)
-   [Liquid chlorine](https://marinapool.multisites.ai/glossary/liquid-chlorine)
-   [Chlorine lock](https://marinapool.multisites.ai/glossary/chlorine-lock)

## Sources

1.  [CDC Healthy Swimming: Operating and Managing Public Pools, Hot Tubs and Splash Pads](https://www.cdc.gov/healthy-swimming/toolkit/operating-public-pools-hot-tubs-and-splash-pads.html)

## Need a hand with your pool?

Call or text and tell us what your pool needs. Estimates are free for qualifying services, and same-day estimates are possible when the schedule allows.

[Call (817) 896-1120](tel:+1-817-896-1120)[Get a quote](https://marinapool.multisites.ai/contact)

![A pool technician working on an equipment pad](https://marinapool.multisites.ai/_astro/technician-equipment-pad.BW5xZMNY_Zum1K5.webp)