1/2 full and will finish filling today. I have a 3 way test kit and all was 0 except ph was 7.2. Have only put about 5 cups of concentrated (Clorox from Sam's) bleach. My well water is known to be very hard (calcium) and I tried every way possible to truck water in but wasn't able to do that in my area. Lost last year's pool to a tornado so got a little bigger one this year and since my hubs gave up on trying to keep it swimmable last year I am taking over this year (with your help, of course). I got the bigger pool so I could do water exercises and cool off in between gardening and storm cleanup in the Oklahoma heat....going to be 101 today....cool front moving through. I'm told by local pool people that is isn't possible to maintain a pool with hard water. The only advice they gave was "drain the pool and fill with softened water". When I told them that was just not possible they said they had no advice for me other than that. Is it possible to maintain a pool filled with hard water? Or am I doomed? Not swimming is not an option....I'll get in it if it looks like pond scum if that's my only choice....but I hope it isn't.