correct me if i am wrong
white is the best for coral
blue is for coral and viewing
actinic is purely for viewing pleasure
my 4 tube setting: 2 x aquablue special, 1 x blue plus, 1 x actinic
if i have 6: 3 x aquablue special, 2 x blue plus, 1 x actinic(viewing)
use to have purple tube, not much use imo
and yes i am an ATI fan
cheers