[hydro]

Hi im after some suggestions ive changed all my filters and the resin but i still cant get the tds reading down any ideas??

[ben M]

What is your tds after ro and after di?

[Dave Willis]

What does your business partner say?

[Jack Judd]

You may have algae in the tank.

[hydro]

Hi its 230 going in and 22 coming out and the tanks is clean no alge at all

[Jack Judd]

mine goes in at 450, guttered but still comes out a 0.  try a new bag of resin, undo all connection and wash with hot water.  attach a filter from tank to resin.  They are cheap and easy to do a fiver or something from the window cleaning warehouse

[Spruce]

Hi its 230 going in and 22 coming out and the tanks is clean no alge at all

Sounds like membranes. They are only working at a 90% efficiency if the figure of 22 is taken before the di vessel.

Changing prefilters won't lower your output tds.

[ben M]

Hi its 230 going in and 22 coming out and the tanks is clean no alge at all

Sounds like membranes. They are only working at a 90% efficiency if the figure of 22 is taken before the di vessel.

Changing prefilters won't lower your output tds.

+1
you need to flush well the ro. What is your tds after DI?