Sourdough Starter from local grocery's bakery

[Chrisan]

I got a sourdough starter from Earthfare's bakery (free by the way!). It seems to be thinner than pancake batter. It's been sitting at room temperature for about 8 hours in a plastic container that's not shut all the way---oh and there's hooch, that watery alcohol layer starting to form at the top. Do I put it in the fridge or feed it? I think I'm gonna put it in the fridge since I don't know what to feed it.

Anyway, I don't wanna kill it or mess up the starter since this is my first time with a starter.

I know that to feed it, you wanna put double the amount of flour+water to starter.
Any suggestions as to what flour I use? I have Hodges Mill rye, King Arthur whole wheat, KA bread, and KA unbleached white. Also, do I just use water or should I add pineapple juice? I've sorta read Peter Reinhart's book, but this is my first time making a sourdough starter.

And if I have, say 1/2 cup of it, I would just addd 1 cup of flour and 1 cup of water/juice, right?

Any help or feedback would be appreciated! Thanks!

[bushwickgirl]

Nice of the bakery to provide you with free starter. Check this link for lots of first time starter info, including maintenance and feeding, Peter Reinhart's starter formula, flour recommendations, using sourdough, bread recipes and just about anything else you want to know about starters:
www.thefreshloaf.com
This link is also useful:
www.sourdoughhome.com

Good luck and enjoy!