It is possible, but it is also possible that you're barely holding off a nascent algae bloom because your chlorine kept dropping before. If you can see this link http://www.poolforum.com/pf2/showthr...a-good-testkit), try testing your chlorine tonight after sundown and again in the morning before sunup, to see if you're losing more than 1 ppm of chlorine overnight. This is a ballpark, but maybe it'll be close enough. If you are losing chlorine overnight, then the haziness is probably due to algae trying to bloom, and you'll need to maintain shock level a little longer.

It is possible that the haziness is from overuse of clarifiers, and the only thing I know to do about that is shock the pool to try to break them down and filter it out.

It is also possible that the high alk is causing it, in which case you'll need to lower it with muriatic acid per the steps that you've already printed out--but make sure that you rule out overnight chlorine demand before you let it come back down.

Janet