RO/DI issues

lightningfront

New member
Recetly upgraded to a larger RO/DI unit. I purchased the 100gpd unit from BFS and was happy after the initial break in was getting a TDS of 0.

After filling and rinsing my new 125 gallon tank twice with RO/DI water I started to get around 27 TDS reading right out of the RO/DI unit.

Why would the unit start to fail after only 350 gallons of water run through it?
 
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