Originally Posted by
Aztec Reef
Does it have to be ro/di?
Yes, by all means. In fact, every time you put your hand (or anything else) in your tank, rinse it with RO/DI water before and after. To take that a step further, you should shower with RO/DI water, do dishes with RO/DI water, do laundry with RO/DI water, etc, so as to eliminate any chance that tap water will contaminate your tank. Tap water contains copper, chlorine, radioactive waste, anthrax, human remains, nano-machines and many other toxins and organisms that will kill fish if so much as a drop of it enters the tank. You should also put your aquarium in an air-tight, pure oxygen-filled chamber to improve gas exchange. This chamber should be built without any windows, so natural light won't cause an algae bloom. It should also be built without any doors so humans don't accidently poison the aquarium through over feeding or improper maintenance. All husbandry tasks should be performed by robots, and those robots should be constructed only by other robots, to further remove humans from the equation. It's probably best to not have any fish in the aquarium, since they're nothing but ammonia factories. Better yet, just don't have an aquarium and leave the poor fish and corals where they were, happy on the reef.