I think you need to put the wife in that room and the tanks in the rest of the house.
Seriously, I would NOT use laminate flooring. Water will get in the seams if spilled and the boards will buckle. Just FYI, this is also true of cat urine/spray.
I think a fish room with breeding tanks would be pretty cool, but I second the thought that those beautiful tanks (I'm envious) should be spread throughout the home. There are ways to do it without them being so "intrusive" and really giving the home an art feel. Beats the heck outta a bunch of cheap framed prints and Ikea furniture all over the house.