I've got a few used Brita water filters, thinking they might be
useful for something. They were time-expired, so I wouldn't use
them for anything potable, but they were still softening the
water when swapped out, although I presume I could recharge
the ion exchange part in them them by washing through with Brine?
So, has anyone come up with some use for these? Seems a shame to
chuck them out.

--
Andrew Gabriel