RO/DI with 1:1?

I have the coralife pure flow 2 RO with pump and auto flush. 50 gpd and 2 DI canisters.

This is the unit: 50gpd 3 stage w/pump

http://ift.tt/1qVZCh5



I am not going through the DI system, just the RO unit. It is all stock.

I measured the product water and the flush water.



In one minute I actually get a little less flush then RO water? The manufacture states that it should be 1:2 ratio.

What should I look at to see what is going on. HAving 1:0.9 is way wrong..

Any clues??? BTW I have had the system for 1.5 years. TDS in is 250ish and RO out is 10-14.... out of DI it is 0TDS