Look for a yellow tag on the top of the boxes. This is how Salifert does thier expire dates. At least this is what my Salifert test kits have had for the past 8 years.I have some old Salifert test kits that came with a system I bought...Calcium, Phosphate, Amonia and Nitrate. Do they expire? I couldn't find any expiration dates on the boxes.
Both me and another local hobbyist purchased Salifert MG kits from a local fish store that were totally horrible. 300-400ppm off and well over a year before their expiration date.What I have always wondered is why a brand new kit doesnt work. I had to buy three kits for mg before I got reliable results.
Gordonious, we have no problem with the truth being known, as long as it's done in a respectful manner.