A mere 5 hours after adding all that bleach and muriatic acid, my chlorine readings (double-checked both total and free) were at 0 again!! Gosh, how much stuff do I have in my pool??? However, my pH had dropped to 7.2.

So even though I added a shock's-worth (546 oz) of 6% bleach in the early morning, I added another 546 oz late in the afternoon. Four hours later, just about dark, I tested and got:
Cl 5+
Free Cl 5+
pH 7.8?? (really hard to get a good read)
Added nothing last night

This morning's readings:
Cl 5+
Free Cl 5+ (it held!)
pH 7.5
TA 80
Calcium hardness 70 (vial started at a light pink rather than the red it has been previously, color turned to a light blue/green after 7 drops, color didn't intensify with more drops)

Pool water decidedly more blue but has had increasing gray cloudiness in last 2 days. Pool is Ocean Blue Pebblesheen which should be a dark but very true blue with no green when fully cured. Clear areas get this gray cloudiness when agitated. Definitely gets stirred up and hazy when I brush.

My plan for the day is to buy some distilled water to see how high my chlorine level really is. My understanding is that I can only use the shot glass method for the total cl (OTO) test, correct? It won't work for the free chlorine test (2 reagents)? Then if I need chlorine, I'll use the CalHypo I got yesterday. Because I wasn't able to accurately test to see if I ever got to 15ppm in chlorine, should I still keep shocking? Shock til the cloudiness disappears? Or does the fact that I was able to keep some chlorine in the pool overnight mean I've killed everything that needed killing and the haziness is just the "dead bodies"?

Thanks for the help.
Sandy