Okay, a more thorough Google search turned up this thread which has the math I was looking for:
http://www.poolforum.com/pf2/showthr...f-tri-clor-add

Converting for my pool volume, looks like one 8 oz puck will increase my CYA by 2.7, so the four I have in my floater right now should be about right to start with. I'll pull it out at night for the purposes of doing my overnight FC drop test until I'm completely done fighting algae.