A funny thing happeded on my way to RODI today

[reefracer]

I have a KENT Maxi that I bought used and decided to install new filters and dual TDS meter today purchsed from Marine Depot. So today I did and don't have any water coming through yet. I belive all tubes are in same location and not really possible to put in filters wrong, I have loosened connection at tube and get water everywhere except the output. Any suggestions?

[reefracer]

Ok guys pay attention, the last third stage (color changing one) can be put in upside down and the water won't come thru Well the little meter sez 008 in and 000 out so I'm back in biz.