ppm levels in ro/di

[Gtt1988]

I had just purchase a new sediment, carbon block, and ro membrane.
After running the ro/di unit for a hour i am still getting ppm levels at .02. I have a reef aquarium, question is what is the ideal range with coral and water quality? and will .02ppm hurt anything?

 

[benzreef]

My RO unit at its best was 0.02ppm, everything flourished. I had mostly softies, clams, and some LPS. Now it's at 4ppm, time for a change! yikes!

 

[Buckeye Hydro]

Guys - no TDS meters typically used by hobbyists will read to hundreths of a ppm.

Check your meter instructions - I suspect what you are seeing is actually 2 ppm.

Russ