I fill the 500l tank via the di and although it's not rocket size checking the tds I keep getting caught out!
So the 11l do should last 10 days but after 8 days work this time it's fooked and then I need to drain the fecker.
These inline tds meters look like they are for around 6mm hose which is no use but is there any other options?
There'll soon be a third pump fitted so not as easy for Di after the pump.