returned and pool completely cloudy

[day1]

Like stated before, keep the Cl up and pump running. And their right, at this point the clarifier won't help, as it's only a flocculant for sinking floating gunk. Seems like your cya may not be stabilizing Cl long enough for it to do any good....but 45
cya should be good. I'd vac to see if that helps while keeping Cl to shock levels. You may want to get water source checked for anything unusual that may be causing this?