I'd like to know why you couldn't add chemicals for 5 days after filling. If it was some issue with your life schedule, we would have recommended not even filling it until you had some chlorine ready to go. If it's on the advice of a manufacturer or pool store, let's get that cleared up. Letting it sit for 5 days was guaranteed to give you a pool full of algae. It will take you more than 5 days and probably more money in liquid chlorine to combat this, than it would just to do it right from day 1 of the fill. Unless you have major water restrictions in your area.
If you are committed to this batch of water...you'll need a recommended test kit, granule stabilizer, a gallon of muriatic acid, and get at least 10 gallons of liquid chlorine/bleach to start out.
Once you have a test kit we can get real numbers and start on your algae killing SLAM.