Once the algae is dead -- no more green -- you can drop back to medium to dark yellow, with no orange. However you should brush the pool thoroughly before you drop back.

See if you can find the HTH 6-way kit, sold by some Walmarts. It's made by Taylor and is a partial replacement for the K2006.

The borax is just to raise your pH, which will drop once you use the tabs a bit.

What does the water look like right now?