Hi All am a bit stumped here as I have tested my Mg with three diff kits and these are the results
Salifert - 1140 tested today (New Kit)
Tropic Marin - 1310 will have to check again as this one was done on the weekend (Kit a month old)
Elos - 1300 tested today (kit About 3 months old)
So has enybody else had this experiance before and wich one would you go with...