This question might be best answered by Chemgeek or Jason.
As you may know, I am writing a pool testing app for Droid phones (SimplePool.)
Currently, I am not validating users input.
As such, a person could enter a value that is wildly unrealistic (pH of 2, FC of 500, etc.)
I would like to limit users to entering only reasonable numbers.
Can you tell me what are reasonable min/max values (values that either are at the limits of testing, practicality, or safety) for the following measurements?
Again, I am not looking for normal ranges, but the min/max value a person may reasonably be able to measure/enter.
Thanks so much,