Does the DMH affect the ORP value in a bromine spa? I ask this question because if it does, a positive answer might have important implications:
First of all an ORP meter will permit someone to generate a bromine-DMH table similar to the chlorine-CYA table.
It will explain why it may be difficult to get high ORP readings with bromine in a spa with DMH.
Finally it will allow a better understanding of bromine behavior. This might be of some relevance for a pool/spa automatic system.