Does anyone use the subject test kit? I've just switched to using this one and the results are confusing if you read the instructions carefully (at least to me).
The titration is performed on a 1 to 12.9 solution and yields a reading in what is documented as ppm CaCO3 equivalents (after multiplying the resultant by 12.9). Converting to Ca++ should be had by multiplying by .4. I get bizarrely high readings with this kit. I'm thinking that the EDTA that is used as the tritrant is also in solution in my aquarium (it is a chelating agent and I'm quite sure these are used in many additives). Although, I would think this would bias the result down not up.
I guess my questions are:
1) Does anyone know of aquarium additives that contain EDTA?
2) Is anyone with this test kit seeing similar results?
Thanks a bunch!
Darrell
The titration is performed on a 1 to 12.9 solution and yields a reading in what is documented as ppm CaCO3 equivalents (after multiplying the resultant by 12.9). Converting to Ca++ should be had by multiplying by .4. I get bizarrely high readings with this kit. I'm thinking that the EDTA that is used as the tritrant is also in solution in my aquarium (it is a chelating agent and I'm quite sure these are used in many additives). Although, I would think this would bias the result down not up.
I guess my questions are:
1) Does anyone know of aquarium additives that contain EDTA?
2) Is anyone with this test kit seeing similar results?
Thanks a bunch!
Darrell