From their own web site, pickling will protect the mebrane for UP TO one year.
Figure on replacing it, call a dealer for price quotes on the consumables. If you do not NEED to use it, or are not planning to use it, you'll find it is simpler & cheaper to just shut it down until you do need it, and start with fresh consumables then. You're looking at "plumbing" i.e. replacing cartridges, and flushing water lines, that's about all.