I have the little brother IC20 and am just in the process of starting up my pool this year, so I don't have it on yet. Last year I started out with my salt on the 2900-3100 border and it was green light... at the end of the summer my unit was shifting between ADD and GOOD... I added another bag of salt and it stayed GOOD for a week and went back to ADD and intermittent GOOD which told me I was probably still on the border. I ignored it as the temps went down below 60 which I think is where it turns off.

So to answer your question.. the unit does produce chlorine between the 2500-2900 range. The 3400 is probably the optimum level.

I will let you know how it does this weekend.