i have a merlin ro and when i first started using it my tds was coming out at 24, lately it has crept upto 50 so i changed the top filter see pic.
having done that the tds is not much better.
i have read things on this forum about back flushing the system would this bring down the tds?
also i have no idea how to do this, can some explain what i have to do
a diagramm would also be helpful, not that i'm thick
just not technology minded
thanx
jay