RO/DI Reservoir + TDS?

[NanaReefer]

Filled my reservoir TDS reads 0. Also 0 from unit. However at about the last 2-3g of water I'm getting a reading of 1-2TDS.
Reservoir is a 32g Brute. Mag 5 & 1/2" tubing is used to fill ATO and mix bucket. It's covered with a black trash bag pulled tight & brute lid.
I allow the pump & tubing to sit in reservoir. Is this the issue? Is this common?

 

[redfishbluefish]

I'm not clear on what you are saying. Are you saying you were running your RO/DI and everything was fine (0 TDS) until just before your reservoir was filled.......At which point the last 2 to 3 gallons the TDS rose to 1 to 2 TDS. If it were me, I'd still use that water knowing that the DI resin would be changed before I make my next batch of water.

OR, are what you are saying is that after making water (at 0 TDS), your TDS raises to 1 to 2 TDS while sitting in the reservoir container?

 

[NanaReefer]

When I'm down to about the last 2-3g of RO/DI in the brute I'm getting 1-2 TDS.

 

[chefjpaul]

Most likely the plastic just picking stuff up.
Residues, dust, particles.

Mine does as well, nothing ever affected and mine isn't always air tight.

 

[redfishbluefish]

Got it! What @chefjpaul said....and I wouldn't worry about it.

 

[NanaReefer]

Thanks guys. Washed it out last night for piece of mind, like that's possible [emoji38]