API ..... Tested against salifert and lamotte, came up with similar results to close to pay that higher dollar amount.
i believe what he is saying is the quality controls from these higher dollar test kits are more reliable. the problem seems to be variance between one test kit and another from these same companies. lamotte has always been the gold standard ever since i started back in the early 90's. i don't test much, more look at the animals and then test if i think it is needed. as someone said at the start of the thread you can really do damage chasing numbers. a one time comparison of test kits is not a definite that the cheaper one is as sensitive,precise or dependable as say lamotte. meaning it was all good this time but three kits down the road and it might be way off.