Mis-information that short cycling eats membranes. Slow death sure and years I find acceptable.
Going off topic here, made me check my notes and do some measurements. -looks like I replaced the membrane Jan 16/07
-last replaced the DI, July /09
-current tap TDS 190, after RO TDS 40, after DI TDS 13.
So bad me allowing my DI to exhaust itself, and yes my membrane is showing wear but it's been 3 years and it's a 100gpd so a rejection rate of only 90% to begin with. Guess I'll change my DI tonight and be good for about another 6 months.
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