Thanks for the info. I remembered as I was looking online at floaters that I have an in-line Hayward chemical feeder so I'll plan to use that for the trichlor.
One other question, how long (days) will it take the trichlor to raise the CYA? I believe I recall reading that it could take a while for the increase in CYA to show. I don't want to overshoot my target CYA level.