Pez de Diablo:<snip> Sorb is not cheap, nor is life. Waste not want not. Don't go overboard and change your sorb out after everydive, this is crazy.
With shipping, I paid (EXACTLY!) $895.00 for three 37-pound kegs of 4-8 mesh Sodasorb HP to be sent to San Christobal in the Galapagos, in preparation for my two week Sky Dancer trip. That works out to be $64.00 for every fill of my Mk 15.5 canister. So Pez de Diablo, I will agree with you, sorb can be VERY expensive.
Then I found out if I would have shipped it through Miami instead of mailed it, it would have cost pennies. I had no idea.
So how much does a keg of sorb cost where you are in Mexico?