30000 gallon inground pool, chlorine 5, ph 7.8 it's been at this level all week, I sweep and add chlorine every day ran out of chlorine started to use bleach. Own this pool for 10 year always dark green when I open, never, never used this much choline not even for the whole year untill I change the filter a month ago, after I change the filter pool went greener and greener and greener, now with this much chlorine it's turning light green, I was hoping to swim one more time before winter but I don't see it. I'm going to pool store and get more chlorine and a better test kit so I can post better readings. The pool is like a light green/grey'is so the algae is dieing ( I hope).