Hey everybody. I’m thinking about getting some kind of RO DI filtration, but I have no idea how it works. It seems like you have to attach it to a water source, like under the sink, and that doesn’t work for me. I’m looking for something easy that fills up a separate tank with several gallons that I can add reef salt to and use for water changes. I’d prefer to just be able to add tap water to it myself without a direct hook up. Does this exist? Not looking to spend a lot and would like something where the filters are easy to replace and I’ll know exactly when to replace them. Thanks in advance.