You want to make sure there is enough sugar for the yeasts et al. More ginger shouldn't be necessary. I would taste it, and judge the sugar levels that way. If it is getting sour, then take a small portion out and put that in fresh sugar water. If it's still sweet, then I wouldn't feed it.
this post was submitted on 21 Jun 2023
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Fermentation
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Ah yeah, makes sense.
I've been feeding it a teaspoon of sugar and ginger since it started, and its starting to foam and bubble pretty nicely. I think I'll taste it tomorrow and if it tastes very sweet, I'll stop feeding it for a couple days.
So far so good, the aroma has gone from a very strong ginger smell to a yeasty ginger smell so it seems to be working very well.