I cannot seem to feed my pool enough chlorine. Woke up after a heavy rain last week to find the pool milky white. Chlorine was down to about 1ppm and pH was low. Started adding bleach, about 5 96oz bottles. Pool turned dark green, and pH was even lower. This weekend I have added 20 gallons of bleach, and 3 boxes of 20 mule team Borax, pH is only up to 7.2 and chorine levels reached about 3ppm. I have never had a problem like this and am quite confused. Pool is a 20 x 40 IG vinyl pool. There is no slime or sliperyness, just green. Yesterday the shallow end finally looks clear and the deep end is only light green. Today I added three more gallons bleach. What happened?