The original poster (and this is an old post 5/14/08) had a TA of 180-200 after they added Alkalinity Up. Adding more bicarb is not the answer and is not something that would clear a pool anyway. Since they indicated the pool had been using Baquacil before, then it's possible there is some leftover (though not enough to show in the test strips) so more chlorine to oxidize the remaining Baquacil and/or algae is what is needed. The fact that the chlorine didn't drop overnight doesn't mean that a higher level won't oxidize what is left, albeit slowly over a few days. So shocking with 12-15 ppm FC given the 30 ppm CYA would be the prescription here.
Some Baquacil conversion pics are shown here
where you can see the color changes and floating particles. It's possible that this poster's pool has only a little Baquacil left, but is the source of the color, film and particles. Shocking with chlorine (or another oxidizer such as sodium percarbonate) will clear the pool. Having the CYA in the pool may make the conversion using chlorine take longer as it reduces the active chlorine concentration.