Chlorine Injector, Pucks vs Liquid


Well-known member
Apr 3, 2011
Katy, Tx
I currently have a Hasa Liquid Chlorine injector, but see that the inline puck injectors have really come down in price. So I'm just wondering which is cheaper, pucks vs liquid, and the pros vs cons for each.


LifeTime Supporter
TFP Expert
Jan 6, 2010
San Dimas, CA (LA County)
The problem is that for every 10 ppm chlorine you add via trichlor pucks, you also add about 6.2 ppm CYA. Say you lose 2 ppm per day. That's 14 ppm per week. And adding about 9 ppm CYA per week. 6 weeks of pucks and you're at the upper limit for CYA. Pretty soon your FC is all bound up, your water gets cloudy, some day your pool turns green and no amount of chlorine will clear it unless you start by draining.