I found this from page 11 of this thread, but to answer your question, I don't think it matters what sugar, but the succanat my have minerals and such to add to the drink. Anyway, here is the info:
Originally Posted by moonshine
Will it ruin my grains to use white sugar? I want to bottle my current batch, and just realized that I forgot to get more sugar and used up what I had for cookies.
I have a little bit of succanat left, but not enough for the amount of grains I have. But I do have white sugar. What if I use it this one time? What will it do to my very currently healthy grains??
Basic Kefir d' Aqua
~2 quarts filtered water (do not use tap water or chlorinated water)
~6 Tbs up to 1/2 cup sugar (white or Rapadura whole, organic), experiment to find a sweetness you like. I like about 1/3 cup.
~ 1 Tbs of Water Kefir (or converted milk Kefir) Grains
Add in Any of the Following:
~6 pieces of dehydrated, unsulfured ginger pieces
~1/8 to 1/4 cup of peeled and sliced/chopped fresh ginger root. The more you use of the fresh, the stronger the flavor, and it's way more 'spicy' tasting.
1 whole, organic Lemon OR Orange. Cut in half and drop in. Make sure the skin is washed and wax/pesticide free.
1 whole organic Lemon or Orange, sliced and dropped in (more intense flavor).
1-3 dried or fresh, Organic Figs for flavor and color. I like Mission Black Figs, personally.
Any dried or fresh fruit you like, even strawberries. Just make sure they are organic.
You can add in one or all of the above. It's mainly to give it 'taste' and help the grains have a diverse 'sugar' to eat.
Put in a glass container with a lid, that is big enough to not go beyond 2/3 of it's capacity.
Place a tight lid on, and let sit for 48 hours. (If you got your grains from Heleen, she says in the info sheet she emails/mails to go one extra day for the first few brews, to help them 'reconstitute'. Other than that, NO other special treatment of 'Real Water Kefir Grains' is needed.)
I then strain it, and refrigerate it. If you like, you can put it in glass bottles with stoppered lids.