So I just figured out I probably have ammonia. I have now added 5 pounds of cal hypo and 3 gallons of 6% bleach and still no fc in a 11,500 gallon pool. UGH! My kids thought it would be fun to throw a few hundred rocks in my pool and I read somewhere that soil bacteria is what usually does the CYA to ammonia conversion. Can't vacuum the debris off the bottom until I can see it well enough to get all the rocks out. Have been filtering and working on this pool for almost a week now and still not much difference. So question, how much time should I wait in between each addition to see if I have finished shocking? I have still not one time had a fc above 0. Also every time I add chlorine the pool fizzes up and I am assuming is realising some unpleasant gases. Is this in any way dangerous because me and the dogs have been around it a lot this evening.