RO Buddy?

[Opus]

So does this top package replace the other 4 filters and than the RO membrane just needs replacing whenever it’s spent?

That is the correct one. Only worry about replacing the DI once it is no longer producing 0tds water. Also, in your pic it looks like they have an extra RO membrane so if they take the $50 deal that is a great deal. Just buying the canisters new would cost you more than $50. It also has the pressure gauge which is good to have.