You need to be patient. There's nothing that will speed it up. You've been fighting foaming from one "magic potion"--algaecide.

We rarely ever suggest that someone add anything beyond the B-B-B basics...bleach, borax, baking soda, muriatic acid and CYA(stabilizer). The two most common additions to the list are Dry Acid in lieu of Muriatic (safer and easier to use) and one algaecide: Polyquat (a type, not a brand).
If people have special problems, like metals, we may recommend something. But everything else? Throw it away!

Carl