Yes, it will take a while to get the algae out of the water.

Are you planning to take care of your pool yourself, chemically speaking? If so, you will need to get a good test kit. The mods here recommend the Taylor K-2006 or K-2006C, available from Amazon. Check the links in the Testing and Adjusting Pool Water Chemistry section. In the meantime, you can get the HTH 6-way kit from your local Walmart to get you started. Believe me, these guys and gals know what they are talking about on the K-2006. It's the best investment you will make for your pool. Pool store testing is flaky at best, and is designed to sell you all sorts of expensive (often unneeded) chemical concoctions.

Best bet for an easy to maintain pool is to follow the BBB method as outlined here on the forums and at the sister site Poolsolutions.com.

If you have questions, don't hesitate to ask them here. It may take a day or two for a reply, as this is the beginning of the busy season here.

Good luck with your pool!

Charlie