I have the TF100 test kit. I perform the daily "blue box" test for CL and pH everyday now. I want to keep my FC at around 4-5. Well, the test only goes up to 5 and it is tough to tell if I am "OK" or up over 5. Do you guys who keep your FC higher than 5 actually do a drop test with the powder everyday? Just curious what your nightly routines are for chlorine when youre up around 4-5FC.