Electrical Question

I am trying to figure out if need to add more outlets around my tank. In
the future I want to upgrade to MH lighting and was not sure if my current
set up would be safe adding Mh also.

This is what I have now and maybe you could answer my question.

I am currently using 2 outlets, both are on the same circuit. Icecap 660
with 440 watts of VHO lighting, mag 9.5 & 7 for tank circulation & skimmer,
200 watt heater, 2 maxi jet power heads and fan in canopy, & 2 other outlets
for my calcium reactor. In the future I will probably upgrade to 2 175 watt
MH with VHO. My question is would I need to add another outlet or 2 from the
breaker box to run all of this safely or go to a higher amp breaker.

Thanks
Travis