Drifter,
Sorry, I can't give you any more info than this....
Fortunately, I negotiated an extra set with the purchase 6 mos. ago (and just changed them out) so I haven't bought any yet. I did refer another friend who bought an LS700 and, as a thank you for the referral, the dealer gave me a $100.00 store credit which I turned into 2 more new mineral filters, 2 new micro (big, round) filters and 2 lbs. of dichlor. Though this doesn't detail the cost of the mineral filters, it's at least a point of reference....
Chris, thanks for the 'tude....