After discussing kits with a man who has experience running this pool, I guess we're going with the DPD kit from BioLab. He reasoning was that DPD tablets have a longer shelf life than FAS-DPD reagents. Since I won't be running the pool and he'll be training the life guards, we'll do this one his way and I'll continue to test my way at my home pool. Thanks for your comments and advice.

Hal