Forgot, I made it easier on my self and went to the grocery store and bought some 5 gal water bottles like you put on water coolers. they work great for water changes and you can store your water easier. I go up to the store and use the ro/di machine for 0.25 per gal. I think it is cool. One thing I need to do though, is stop using tap water for top off and use one of the 5 gals of fresh water for top off. this would last me 5 to 7 days. I don't know how much they are where you are, but, down here in J'ville, the bottles are $11 and you can keep them.
IMO it is worth 25 cents a gal to get good water than to go through the de-chlor and all that jazz...