Question about rodi tds

[jsweir]

My rodi started showing 2 tds coming out so I have more filters on order. Today I checked and it has 0 tds coming in to the di and 2 tds coming out. Is that possible or is my tds meter acting up?

 

[One Reefing Boi]

any idea what pressure the water coming in is? My filters have a min and max pressure listed that they will work and notice that when I attach it to my sink and run full blast, I get 5-10 TDS but if I have it on half, I get 0 TDS

 

[jsweir]

A little above 60, it has been zero for about 600 gallons or so

 

[One Reefing Boi]

A little above 60, it has been zero for about 600 gallons or so

I would assume then that the issue is a filter starting to go and replacing it should fix your problem then

 

[Alchameth]

2 TDS... I'd kill for 2 TDS. Really depends on what TDS is at the tap, but filters should last more than 600 gallons

 

[jsweir]

At tap is about 375

 

[Alchameth]

My tap is about twice that... I use my drinking RO for tank water too and my RO side TDS has been holding for the past year.

 

[K7BMG]

Check the orientation of the probes.
one of them could have twisted out of alignment. Looking through the T fitting, the pins of the probe need to be on the left and right so the water passes through the two pins.
If they are lined up dead center it will not work correctly.

When was the last time you checked your resin.
600G going through a single canister of mixed bed, I gather the Anion is shot.