I have a TF100 test kit and as I understand the best method for testing for FC is the FAS-DPD method. That being said it seems like the recommended method for daily testing, unless you're doing a SLAM, is to use the basic tests kit with the OTO drops. If you need to maintain high levels of FC because your CYA is higher, I'm thinking in the 6 or 7 range, is there a workaround for using the basic kit. For instance, can you dilute the pool water 50/50 with either tap or distilled water, and then just multiply the result that you measure by 2?