• Gervin GV7-Restart Yeast
1 1

Gervin

Gervin GV7-Restart Yeast

Gervin GV7-Restart Yeast

£1.79
£1.79
Sale Sold out
Taxes included. Shipping calculated at checkout.
View full details

Gervin GV7 Restart Yeast (brown label) is a specialist strain for restarting a stuck fermentation that has residual sugar left. Keep a sachet in the cupboard for when a wine stops before it should.

Key features

  • Restart yeast from Gervin
  • Ideal for restarting a stuck ferment with residual sugar
  • Brown label in the Gervin range
  • Dried yeast, quick to have on hand

How to use

First check with a hydrometer that the gravity has not moved for a few days, then add the yeast to the stuck wine or beer. Sanitise anything you use with no-rinse ChemSan.

Goes well with

For any winemaker or brewer with a fermentation that has stalled. Compare it with the rest of the Gervin Yeast Full Range, or use our Beer Yeast Selector.

Frequently Asked Questions
How do I know if my fermentation is stuck?
Take two hydrometer readings 24 hours apart. If both are the same and above the expected final gravity (FG) from your kit instructions, fermentation has stalled. Common causes are temperature too low, not enough yeast, or nutrient deficiency.
How do I use GV7 to restart fermentation?
Warm the beer to 20–22°C first. Sprinkle GV7 directly onto the surface of the beer without stirring. Add a teaspoon of Yeast Nutrient at the same time. Leave undisturbed for 24 hours, then check for signs of activity. Fermentation usually restarts within 24–48 hours.
Will GV7 change the flavour of my beer?
GV7 is formulated to have a very subtle, neutral flavour profile so it doesn't significantly alter the character of your existing beer. It finishes clean and clear, which is why it's also popular for lager fermentations.
Can I use GV7 for a normal primary fermentation?
Yes — GV7 can be used as a primary yeast, particularly for lagers and light ales where a clean, neutral fermentation character is desired. However, for most ale styles, GV12 is the better all-rounder.
What if GV7 doesn't restart my fermentation?
If fermentation still won't restart after 48 hours, check your temperature (it should be 20–22°C), ensure the beer isn't infected, and try adding more Yeast Nutrient. If the beer is already at or near its expected FG, it may actually be finished — confirm with your hydrometer before assuming it's stuck.
🧬

Yeast Specification

🌡️15–25°CTemp Range
🍷15%ABV Tolerance
➕ Pitch Rate5g/23L
🎯 Recommended ForPurpose-built to kick-start a stuck or sluggish fermentation, particularly lagers. Restarts within 24–48 hours. Flocculation / fermentation speed / nitrogen requirement: Not published by Gervin for this strain.
💧 RehydrationWarm the beer to 20–22°C, sprinkle onto the surface without stirring, add a teaspoon of Yeast Nutrient. Leave 24 hours undisturbed — usually restarts within 24–48 hours.