I agree wit th opinion of a ...
Published by Guillermo Soberón Chávez, Aita Infraestructura - Partner
I agree wit th opinion of a faulty O-ring. Check that first and then, if that doesn't work check the membranes.
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By the way, if you have either a faulty O-ring or damaged membranes you will have sudden changes in TDS.
Published by Guillermo Soberón Chávez, Aita Infraestructura - Partner