Ro/di ??

[Scott B.]

Scott B. here. Extremely new to the hobby, 2 months. Bought an existing 75 gal tanks with coral and fish. Everything is going great but I have a question on my RO/DI. I have a BRS 4 Stage Value plus system. I replaced all of the filters and the membrane yesterday. The TDS is sitting @ 002. I know it should be zero but I have run this sucker for hours, flushed the membrane and still sitting on 2. Prior to the filter changes, I was zero. Any ideas? :headwallblue:

 

[nereefpat]

After RO it may have some tds. After di it should read zero until the di resin is exhausted. Are you sure you have RODI and not just RO?

 

[SFish]

BRS 4 stage should have DI. What color is the DI? Did you replace it? Are you sure the membrane is in all the way?