Step 5Measuring the gravity of the situation
Right, back to the serious business of beer making.
By adding all this sugar we've increased the gravity of the water. In this case I've increased it to just over 1.062. If you need to learn to read a hydrometer, read the side of the packet. It's a complicated business which involves looking at the big scale at the side and noting down the number. (actually there is more to do that if you want it really accurate).
The easiest way is to use a sample measure which you fill up with liquid from the fermentation vessel and stick your hydrometer in it. Then read the number off the side as I've previously mentioned.
Why do we want to do this? Well as the ginger beer plant starts breaking down the sugar it'll break it down to alcohol which reduces the gravity.
If I measure the gravity at the end of the fermentation I'll know how alcoholic it is by going into my favorite search engine and typing 'homebrew gravity alcohol calculator' and picking the snazziest applet I can find and filling it in.
This is optional and has nothing to do with the final result and you can skip it if you don't care what you're drinking.
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