Be careful that the Ultra bleach is nothing but sodium hypochlorite!
Regarding chlorine levels . . . if you've got a concrete pool, go ahead and put it all in. But, hold off if your pool is vinyl or fiberglass. "Orange" is already high enough, till you know your CYA level.
Instead, work on lowering your pH. BUT, to be sure of an accurate test, you must dilute your pool water 50:50 with distilled (not: bottled, spring, crystal spring, super pure or ANYTHING except distilled!) before testing. Distilled water won't change the pH much, but will dilute the chlorine that otherwise could convert phenol red in to chloro-phenol red, a different indicator.
Bookmarks