Good solid move using GFCI.I totally get where both of you are coming from. I had a GFCI on the dedicated circuit but it tripped so often that I felt that the tank was seriously at risk. However, now that I am thinking more deeply into it, I am suspecting that my old VHO lighting in the canopy was probably the reason. The canopy did not breath as well as it probably should have, (even with small fans) and I think moisture collected. Also back in those days think of all the AC equipment we had plugged into 1 outlet! Now so much of our equipment is DC so not nearly the same amount of electricity pulling on the circuit. Because of that I think I am going to have another GFCI put in that outlet and try again. Its probably not had one for 20 yrs and I haven't been even shocked so maybe this is not necessary, who knows?
This morning I did move all the equipment that touches the water to the circuit that shares with our bathroom, so it has a GFCI. However the LED Photon fixture (hanging14" above the tank) and the 2 Vortech powerheads are on the dedicated circuit without protection. I really can't imagine a scenario where they could cause an accident.