RO/DI

[lefty53]

I am in he process of accumulating stuff to set up my 75 gallon salt water reef tank. My question is do I need RO/DI or can I use tap water that has been aged. I know that I have to make sure that the salinity and temp are the same for my water changes but to initially set it up will I need it?

[BigTruck6o2]

You cant go wrong with RO/DI, it will end up saving you time and money in the long run. Id either purchase a RO/DI unit, or go to the LFS or Walmart and purchase your water from them if you dont get a RO/DI unit. I wouldnt recommend using tapwater but of course there are people that do it.

[choupic]

What kind of water would you buy from walmart ?

[demodiki]

Distilled water or the water out of their...I'm not sure what you call them...those water machines outside.
Get the RO/DI...next to your lights, it's the best investment you will make.