I am taking the CPO course later this month , so I just reviewed Certified Pool Operator (CPO) training -- What is not taught and had a quick read through the handbook, but there is one thing in particular that I just don’t get ?
Chem geek , has touched upon it in the OP , but if he or any one who has taken the CPO course could clarify , that would be great ,
On page 65 of the handbook it basically states that, the higher the TDS the more organic / nitrogenous contaminates are present , but what brings them to that conclusion ??
I can understand that , the more bather waste , the more chlorine is required, so that would leave a higher residual , which would read as TDS ( such as salt etc ) , but then it follows that the extra chlorine used would remove any such contaminates also, by way of “ breakpoint chlorination “ ?
Surely , it makes more sense to check such nitrogenous products by testing for FC and then TC than to be guided by TDS, or am I missing something obvious ?