a plunger, hot water and a measuring cup and still my bathtub wouldn't drain.
i've been informed that i overdid the chemicals and that i should *not* have plunged while the tub was full of chemicals. whoops.
and then, as if by magic, an hour after this hours-long ordeal, i checked and the tub was clear. water drained. (still stinky) i ran a bit of water - still slow but i may be able to shower!
to be continued...