So, do i need to keep a heater and a pump for flow in my RO container? I've been just making it as needed but I'm going to now move into a large container to have more on hand and make water changes easier. Also, if I have a separate container for mixing salt should I just make it when I need it or should I keep some of that on hand too? I would guess that would need at least a pump to keep movement. Thanks for the help!