So we just got our first pool, set it up on Sunday. We filled it little by little for 2 1/2 days due to our shallow well. It POURED rain for 2 days and yesterday we noticed that the water is green ...what happened??? DH did the test strips to find out what was needed, we added everything to get the levels right yesterday evening. Help!!!! What do I do now? How long does it take for it to clear?