Is it more or less the same thing if I do a 5 gallon water change for 5 days in a row versus changing 25 gallons all at once? The reason that i ask is because for now, I am limited to taking my 5 gallon jug to the grocery store in order to buy their RO/DI water. I understand that in the future I would like to get an RO/DI unit, but I need a quick solution for now. So, will it work? Or should I just keep filling the jug and transfering it over to my 18 gallon tupperware container?