220 PPM is probably going to drift too high. You really don't want to have your pool go above 7.8 because won't be able to tell the difference between 8 -- which would probably be OK -- and 9 -- which would NOT be OK. So your upper limit on pH is partly based on testing capability rather than pool chemistry.

If you add acid WHILE you fill, and let the hose splatter into the water, instead of having the hose end IN the water, you'll aerate quite a bit of the TA away. Just make sure you DO mix the acid in the pool carefully, with the hose, and do NOT get the pH much below 7.0.

1# of dichlor is too much for 100 gallons of water (about 700 ppm of chlorine). That won't hurt a concrete pool, but if you've got vinyl pool, you may get some bleaching of the color. However, if the sunlight doesn't remove the chlorine immediately, you can be pretty sure anything that water touched is algae free.