Personally, I think adding either piece of equipment to too small a tank causes the biggest issues.
Not as often as now days, used to you'd see someone's system crash because of some reactor incident and when members would inquire of the set-up, you find out they have a 20L, 40B, or a 45g bowfront...... Theres not much room for error in small tanks and I don't care if you are growing sps specific, if ya don't have time to dose two-part everyday, maybe you you need to try softies or get a bigger tank.....