I ordered some tricide-neo from KoiAcres just now and I'm going to mix it as a spray solution so I won't waste it. The salesman said to keep it in a cool dry place and use 2 or 3 baggies to seal it up so moisture won't get to it and that the shelf life was close to 2 years. I'm going to spray my girl's feet with it after cleaning them in a weak epsom salts solution. Hope it works - can't stand to see them limping and I know how bad it must hurt them.