Sid700 had a great advice. Maintenance is what i have to think of.
Right now Humidity is not so bad because of the high ceiling. I had build in a drain pipe in the fish room so when I change water, all I do is run a hose down to it. For fresh water tank, when the power go out, all you reallly need is the battery pump and I got that on all of them. It detect the plug and when there are no power it turn on, this had save my fish in the past. I do have really costly fw fish.
But for sw, I guess i have to get a UPS. I do have lots of those laying around, just have to figure out the size that I need to use.
And there are amp, I have one xtra outlet of 20 amp in that room now , do I need more?
Man, this sound more and more like building a network room, back to what I used to do .