What is a bad TDS?

Rmckoy

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My opinion is its ok for initial.fill but do not keep adding tds tap water. As long as you dont continously add to it and you top off.with 0 tds rodi water or do wcs with 0 rodi ur good to go.
D
I am guilty of the same .
needed to fill a 230 with only 90 gals plus 25 gals of new water. .
Waiting 24 hours for another 90 gals seamed like a long time

that being said .....
I think some of the issues we all have down the road is caused by the long term effect of the initial filling process
 

Spieg

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My tap water often reads TDS in single digits. Problem is it doesn't always stay that way (changes a bit from season to season), and I never really know what dissolved solids are present. Not worth the risk IMO to go without RO/DI (and with high quality source water, your RO/DI filters should last a VERY long time = almost free to operate).
 
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Ebbott

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My opinion is its ok for initial.fill but do not keep adding tds tap water. As long as you dont continously add to it and you top off.with 0 tds rodi water or do wcs with 0 rodi ur good to go.
D
considering I was making the RODI in my bathtub, and it was going to take days to get all the water I needed, I went with tap for the initial fill. Two other tanks went fine this way.

Bu, all water from now on, will be RODI.
 

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