- Jun 20, 2012
- 3
What is practical difference between Cal-Hypo and tri-chloro-s-triazinetrione? I live in a small town and tri-chloro-s-triazinetrione is more available than Cal-Hypo, in 3" tabs as well as "shock." Note: it says do not mix with Cal-Hypo, how long after applying Cal-Hypo could you use tri-chlor? Could u use tri-chlor 3" tabs in the skimmer after using Cal-Hypo to shock?