i wonder if that would work to, it may help me save some cash when i put the sand in my tank....
Well if i was to do that i would put the sand in the tank (with RO water) and stir it a lot to mix the RO water and the sand nice and well, that way you only introduced a few gallons of tap water which is diluted by whatsoever amount of RO water. Dunno if that would work though...