You probably have a bit of algae starting up, since the winter in many places was so much warmer than normal. Run a set of tests, post the results here, and we'll help you get it going. Without your pump running, there's not much you can do to clear up the algae, so get it running as soon as you can, tell us your CYA level, and we'll help you figure out how much bleach to add to get it clear.