Fermenting Airlock

This guide covers all the basics that you need to know to create probiotic, healthy milk kefir using milk kefir grains. We have well over 10 years of experience and know how to get milk kefir grains to thrive so you can also have them for a lifetime.

If purchasing our KoruKai Milk Kefir Grains or our Milk Kefir Kit this eGuide is included with your purchase.


You will get the eGuide as downloadable pdf so make sure you enter the correct email address when placing your order.

Last update: 12th March 2024

UNAVAILABLE AT THE MOMENT. Sign up below to get an email once it is available again.

We are excited to bring our very popular fermentation workshop to your home!

Classes consist of videos, online lectures, step-by-step instructions, recipes and tips and tricks. We will also answer all your questions and help you along the way. You can join anytime and watch the content at your own pace. You get 6 months to view the contents and ask questions in the forum.

This silicone fermentation airlock and stainless steel band is perfect for keeping lacto-fermented pickles and drinks under an airlock during fermentation and storage. As pressure builds up gas pushes out the top of the spout without letting air in.

Diameter of airlock is 8.4cm

One airlock with ring is $8.90

For airlocks without ring please go here.

pH strips are a quick and easy way to check the acidification of your cheese and ferment.

In a lactic ferment and in cheese making beneficial microbes are underway to turn plant sugars and lactose into lactic acid.

This acidification can be measured and ensures your ferment or your cheese is on the right track.

For most cheeses timing of salting is really important; you want the fermentation to be just at the right acidity before you apply salt to slow it down.

Stainless Steel Thermometer for kefir, yoghurt and cheese making

13.5 cm long with clip

This thermometer is an accurate way to ensure you are heating your milk up to the right temperature for milk kefir, yoghurt and cheese making. It contains handy indicator lines so you get your temperatures right every time without even checking your recipe. 

This thermometer has a clip to attach the thermometer to a pot or jar.

We will make a big batch in a certified dairy factory twice a year so you can stock up when needed. We have it available over the next week. Orders can be made until 3rd May, 8am. We will ship it on the 4th May.

More info and FAQ is below!

Stainless Steel Strainer for Milk and Water Kefir Grains

10 cm diameter

Small round stainless steel sieve with a fine wire mesh.
Perfect for use when straining the kefir grains out of the finished kefir. It can also be used for sieving flour or draining food.

We have put together this kit for anyone wanting to make their own apple cider vinegar.

Apple cider vinegar is easy and satisfying to make at home and the health benefits are numerous.

A lot of cider vinegar in the supermarkets are pasteurised and filtered. This removed the microbiome of the vinegar and you won't get the maximum health benefits from it.

We only use certified organic food and filtered spring water to grow our grains!

Make your own fizzy, probiotic drink to benefit your digestive tract.

Perpetual culture, use over and over again. 

3 Tbsp of fresh or 1 Tbsp dried organic water kefir grains (choose below) to make 1 litre of fizzy, probiotic drink every 48 hours.

Come with our comprehensive Water Kefir eGuide with recipes for lots of inspiration.

We recommend our Water Kefir Complete Food to feed the grains optimally.

Shipment of fresh water kefir grains every Monday (or Tuesday if Monday is a public holiday). Orders and payments need to be in by 4pm Saturday to get shipped the following Monday.

We have put together this kit for anyone wanting in making delicious water kefir at home.

The KoruKai Herb Farm "Water Kefir eGuide" will be sent via email once you have placed your order. Please look for an email with the subject line: [KoruKai Herb Farm] Files available for your order. It will guide you along step by step to make your own probiotic, healthy, fizzy water kefir sodas at home.

You can get an additional glass jar here.

Billions of probiotics per tablespoon for gut health.

1 portion of organic milk kefir grains to culture 1 cup of milk every 24 hours, which can increase to 1 litre within 2 weeks. Available in hydrated and dehydrated form (please select below).

Shipment NZ wide to urban and rural addresses as well as PO Boxes.

Shipment of fresh milk kefir grains every Monday (or Tuesday if Monday is a public holiday). Orders and payments need to be in by 4pm Saturday to get shipped the following Monday.

We have a set amount of grains per week and are generally out of stock by the end of each week. If this product is out of stock it will be back in stock on Saturday evening, so you can order for the following week.

We will make a big batch in a certified cheesery once a year so you can stock up when needed. We have it available over the next week. Orders can be made until 3rd May, 8am. We will ship it on the 4th May.

Lacto-Fermentation - Making Sauerkraut, Kimchi and delicious Pickles loaded with Probiotics for Gut Health

We have been fermenting vegetables ever since we started a vegetable garden well over 10 years ago and we love the support that they give to our gut microbes to keep us healthy.
At some stage throughout the seasons, you may also find yourself with too much cabbages, carrots and beetroots and would like to turn them into healthy, vibrant and delicious ferments.
This is a newly updated version containing 7 more recipes as well as pickling - the traditional way.

This eGuide contains 45 pages of detailed instructions and recipes (please find the table of contents below).

This is an ebook and will be available as a pdf to download once your order is placed.

This glass fermentation weight is just what you need to make ferments successfully at home.
Place it over your shredded vegetables and fit a fermenting airlock on the jar.
They are also great to make homemade apple cider vinegar.

Diameter is 70mm, depth 25mm
Weight: 170g +/- 10g

The weight fits most wide mouth preserving jars. Always measure the top diameter of the jars before placing an order. Make sure that the diameter does not get narrower further down.

This weight fits our 1 litre Glass Jar with stainless steel compound lid.

One weight is $8.50

Fermenting, preserving  and storage jar with stainless steel compound lid.

Capacity: 1000ml

Size: 17cm high

Mouth size: 7.6cm wide mouth

Certified organic water kefir food containing sugar, molasses and micronutrients to feed your water kefir grains optimally. This pack contains the food for water kefir grains only, you need to have your own grains or buy them from us.

This way they stay healthy and produce a better probiotic fizzy drink for you and your family.


Available in 100g, 500g and 1kg bulk pack in a home-compostable, biodegradable pouch.


Containing only certified organic ingredients so that your water kefir grains can thrive (do not come with the grains). Without any roundup or other agricultural chemical residues, which could have a negative effect on the microbes in the water kefir.