My sourdough starter has turned yellow is it still good? I have two sourdough starters going one I keep in the frig. the other on the counter. The one on the counter has all of a sudden turned yellow. It was fine yesterday and when I went to feed it today it had a crusty film on top and it is a pale yellow. Is it still good? 

Neither one of my starters has hooch is that normal?  They have been going for about 3 to 4 weeks. They also are not very sour smelling. Will this just mean the bread wont be very sour? I got the start from a friend I used it and the bread was great. I saved some to do the two starters I have.
Thank you for any help
Sounds like your starter has dried. Keep the starter in a cool place (fridge is too cold). Feed it every few days with flour and some water. Before adding the flour and water, discard maybe even half of the starter (best option is to bake every few days). Otherwise you'll end up with several pounds of starter... As with all food, use your senses. If it tastes and smells OK (for sourdough starter...), it's OK. 
So, to save your yellow starter, add a little moisture and fresh flour and see what happens. It takes a few days for the right growth and bubbles to appear.