I have an electronic aquamag plus, the 'mains' lead is missing and there is only a short piece of twin black/black with white stripe, of cable going into the unit, I understand that the unit is run on 9v dc supply, please advise polarity of cable, which one is the positive, and what is the current capacity of the mains /9v dc transformer. Also what size cable do I use for the coils that wrap around the pipes and how many turns nare needed. i am a retired electrician.
many thanks,

ray Hollins