---
title: Already Own a Carbonation Stone? Use It With FizzWizz
url: https://fizzwizz.ca/stone-modification-kit/
date: 2026-10-15T07:41:40+00:00
modified: 2026-10-15T07:41:40+00:00
lang: en_US
---

# Already Own a Carbonation Stone? Use It With FizzWizz

If your bright tank already has a carbonation stone, you may not need a new one to move to automated carbonation.

## The Stone Modification Kit

Every carbonation stone has to be modified before it can be used with FizzWizz. The [Stone Modification Kit](https://www.brewwizz.com/products/stone-modification-kit) does that, and adds safety features that protect your product and the FizzWizz from spills and backflow. It contains:

- a quarter-inch 90-degree NPT fitting
- a zero crack pressure check valve
- an isolation valve
- a quick-connect coupler plug

The same kit is part of the Basic and Alternative Tank Fittings Kits, which BrewWizz offers for tanks that will keep their existing stones.

## What changes, and what doesn't

The stone stays the same. What changes is how gas reaches it. Instead of a fixed regulator pressure, FizzWizz feeds the stone through its own solenoid and flow controller, calculating the finish pressure from product temperature and tank pressure and holding it ([How It Works](/how-it-works/)).

A check valve still belongs on the stone circuit ([Check Valves](/check-valves/)). You'll also need a dedicated thermowell for the WizzTemp temperature sensor ([What Is a Thermowell](/what-is-a-thermowell/)).

## Setting the flow

Our rule of thumb is that most stones stay in efficient hydrophilic mode under about 0.8 CFH per inch: roughly 19 CFH for a 24-inch stone, for example ([Hydrophilic vs. Hydrophobic](/hydrophilic-hydrophobic-stones/)). BrewWizz's [Stone Flow Rate Calculator](https://mobilebrewwizzdata.onesmartview.com/co2FlowRate) will estimate a flow rate and carbonation time for your tank and stone. Start lower and use your plots and the sight glass to dial it in.

## Clean it first

An existing stone may have years of use behind it. Clean it properly before the first FizzWizz run so you're judging the controller, not a plugged stone ([How to Properly Clean Your Carbonation Stone](/clean-carbonation-stone/)).

**Want to check your stone is compatible?** [Send us the details](/contact/), or order the kit at [brewwizz.com](https://www.brewwizz.com/products/stone-modification-kit).

## Sources

- brewwizz.com, [Stone Modification Kit](https://www.brewwizz.com/products/stone-modification-kit) and Basic/Alternative Tank Fittings Kit pages.
- FizzWizz [How It Works](/how-it-works/) (stone circuit).
- [Hydrophilic vs. Hydrophobic](/hydrophilic-hydrophobic-stones/) (0.8 CFH per inch).