I just moved into a new house and set up a new 120g above my basement. I want to creat a continuous RODI system and then when needed to fill a container for water changes. So was thinking having the first container 30g for the RODI then have it piped to another 30g for water changes. Plan on having a ATO unit from the first container to the tank and a pump in the second container to fill after water changes. Those are my thoughts. Just wondering what others have or doing. Pictures would be awesome. Thanks.