Do you have any metal in your water? You will have to post numbers of chorine, combined chlorine, ph, alkalinity, calcium and cya, then we can help you better. If the chlorine didn't kill all the algae your water could be slightly green. Lime green could be that your pool got stained from the high chlorine precipitating metal out of the water onto the pool. Drop your water level slightly and see if the pool is a little yellow, yellow and blue make green. Don't worry - it can be cleared up.