Best way to add some quick chlorine without adding CYA?

Is there a product I can keep on hand to add some quick chlorine to the pool that's safe to use and won't increase my CYA level? I use trichlor tabs in an in-line feeder and my CYA was 80 as of June 9. Occasionally, the water test comes back with a lower level of chlorine than I want and I'd like to quickly bring it up (the feeder will take a while to accomplish this).

I had previously purchased a case of powder Shock Plus bags at Costco which are Aqua Chem brand (58% sodium dichloro-s-triazinetrione). I don't always have liquid chlorine or bleach on hand and my experience has been that it's sometimes degraded in this neck of the woods or Wal-Mart is simply out of stock.

I've been testing the water over the past few weeks with my Taylor K-2006 and I have read and re-read the little manual that came with the kit and want to run this question past some experts. Can I use bags of cal hypo by adding to water (or dissolving then adding to water) without taking my trichlor tabs out of my feeder (SO LONG as I don't pour the stuff in near the skimmer)? What other product choices are there and where do I find them?

Your best bet for a quick chlorine increase is bleach, but you can use the Cal-hypo if you dissolve it in water and then put it directly into the pool...once it's dissolved in the pool water it's no problem, but you do NOT want straight cal-hypo to come in contact with trichlor tabs--the result is sometimes explosive.

If my CYA was 80, I wouldn't be using trichlor pucks or dichlor shock powder anymore. Both are stabilized and will continue to raise your CYA. Yours is high enough already.