Welcome to TFP!!
We do not follow the "Breakpoint Chlorination" method to eliminate CC, and in most cases would not consider .5 CC a problem unless there are other issues with the pool. I commend you for wanting to be more specific, and that is what our pool care methods are based on.
We base our pool care system on accurate testing and only adding what the pool needs, when it needs it. To do that you need your own accurate test kit, hopefully one of the
recommended test kits. To effectively practice the TFPC methods, the FAS/DPD chlorine test is essential. All the kits on the list contain that test while very few other kits do. The kits sold at the pool store generally won't won't cut it, but be careful pool store employees are known to say “it's the same thing”. Generally it's not!
I recommend the
TF100 as it was designed for residential use and has more of what we do use and less or none of what we don't use often.
The only other real option for a test kit is a Taylor K-2006. Be careful comparing prices because the K-2006 comes in sizes, designated by a letter. The basic K-2006 has .75oz bottles. You need to get the K-2006-C to get the larger bottles that you want. Even then it is a little short on the reagent & powder for the FAS/DPD test.
I also have the
SpeedStir and
Sample Sizer. They speed testing and accuracy.
So, how does your water look? Is the CC of .5 your biggest concern?