---
title: "What Is Flocculant? Pool Glossary | Marina Pool Services"
description: "A flocculant is a product that drops fine particles to the pool floor to be vacuumed out. Plain-English pool glossary from Marina Pool Services in Grapevine, TX."
url: https://marinapool.multisites.ai/glossary/flocculant
publisher: Marina Pool Services
phone: +1-817-896-1120
quote: https://marinapool.multisites.ai/contact
---

Water chemistry

# Flocculant

A flocculant is a product that drops fine particles to the pool floor to be vacuumed out.

Flocculant, or floc, is a heavy-duty cloud clearer. It clumps particles so they sink. You then vacuum them straight out to waste.

The process takes a day. You add floc, run the pump a few hours to mix, turn the pump off overnight, and vacuum to waste in the morning. Do not run the debris through a [sand](https://marinapool.multisites.ai/glossary/sand-filter) or cartridge filter. Floc needs a way to bypass the filter, so it works best with a [multiport valve](https://marinapool.multisites.ai/glossary/multiport-valve). It costs water, so top off after.

[Marina can helpAlgae Treatment](https://marinapool.multisites.ai/algae-treatment-grapevine-tx)

## Related terms

-   [Clarifier](https://marinapool.multisites.ai/glossary/clarifier)
-   [Cloudy water](https://marinapool.multisites.ai/glossary/cloudy-water)
-   [Multiport valve](https://marinapool.multisites.ai/glossary/multiport-valve)
-   [Green algae](https://marinapool.multisites.ai/glossary/green-algae)

## Need a hand with your pool?

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

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