I've installed the 4Gallon Hasa Chlorine Injector, upgraded to the 3/8" kit, works great. The issue that I've come across is how to add the chlorine in. Do you put in one gallon and wait a few days, then put in another one? I find that when it gets low, the only way to add the 4 Gallons is to drain some out of the unit.
So I'm just curious as to how others add chlorine to their injectors.