I getting a bit confuse with that charts... let me explain....I found that in general my tanks works better when I go to the RED area in that charts, in fact according to that charts I am burning my coils, but I'm not. The recommended settings for 2.20 resistance is 8.00 / 4.20..but at that settings my tank is under performing, then I crank up the power to 11.0 / 5.0 and is perfect... please..someone explain.