Would I have to put in a separate breaker for the tank? (eventually) a
90g reef, pumps, skimmer, etc. MH lights plus any other lights I need,
chiller.

I'm disabled and spend 20 hours/day in bed so on the same line
(without adding a separate breaker) will be a computer, lg. LCD TV,
recorder, A/C.

Probable too much? I'm in an apartment and either have to get
permission (very hard to do), or have someone do it on the weekend.

Thanks, Bob