---
title: "What Is Scale? Pool Glossary | Marina Pool Services"
description: "Scale is hard white or gray calcium buildup on tile, surfaces, and equipment. Plain-English pool glossary from Marina Pool Services in Grapevine, TX."
url: https://marinapool.multisites.ai/glossary/scale
publisher: Marina Pool Services
phone: +1-817-896-1120
quote: https://marinapool.multisites.ai/contact
---

Water chemistry

# Scale

Scale is hard white or gray calcium buildup on tile, surfaces, and equipment.

Scale forms when water carries more calcium than it can hold. Heat, high pH, and high alkalinity all make it worse. You see it as a crusty line at the waterline, rough plaster, or white flakes at the heater and salt cell.

Left alone, scale cuts flow, clogs [heat exchangers](https://marinapool.multisites.ai/glossary/heat-exchanger), and cuts the life of a [salt cell](https://marinapool.multisites.ai/glossary/salt-cell). Fix the balance first by checking [pH](https://marinapool.multisites.ai/glossary/ph), [alkalinity](https://marinapool.multisites.ai/glossary/total-alkalinity), and [calcium hardness](https://marinapool.multisites.ai/glossary/calcium-hardness). A pro can then remove built-up scale from tile and equipment.

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

## Related terms

-   [Calcium hardness](https://marinapool.multisites.ai/glossary/calcium-hardness)
-   [Langelier Saturation Index](https://marinapool.multisites.ai/glossary/langelier-saturation-index)
-   [Salt cell](https://marinapool.multisites.ai/glossary/salt-cell)
-   [Hard water](https://marinapool.multisites.ai/glossary/hard-water)

## 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)