This part assumes you are ready to separate the Kefir from the Kefir Grains and begin a new batch.
Gather the tools you will need. Jars, large glass or plastic measuring container (I prefer something that holds the entire container/batch that I am working with). The picture shows a 1/2 gallon glass measuring container.
You only need 1 strainer. I prefer to use two. The first strainer has large holds and the second strainer has smaller holes.
Pour the jar with the Kefir Grains into your strainer and then gently turn the Kefir Grains to allow the liquid to fall through.
Do not press the Kefir Grains through the strainer.
Repeat. If your strainer is large enough, keep adding the liquid containing the Kefir Grains until you have strained all of the liquid.
Since I use 2 strainers, whatever falls into the lower/second container is pressed through and goes into the kefir. But I want to play nice with my kefir grains in the top strainer because those will go into my next batch of kefir.
Transfer Kefir liquid to a clean jar and if you need to, label it with something like "Drink Me" so you don't serve yourself the wrong container. This is ready to drink.
Drink within the next few days to a week or two. I'm not aware of an actual expiration date so research it. I tend to set the limit of whatever the milk expiration date was, but Kefir fermentation also acts as a milk preservative. For how long? I make no claims.
You can also combine newer and older batches of Kefir to blend flavors. It's up to you to decide what you prefer.
Add Kefir Grains into a clean glass jar.
Leave about 2 inches gap at the top of the jar. This is a 1/2 gallon jar. If your jar is smaller you can leave less of a gap.
In these pictures I used coffee filters. Today I also use the canning lid and screw band. During primary I keep the screw part loose so that carbon dioxide can escape.
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