chamber is on top in the pic. It is the clear one. It looks like the water comes out of it and goes into the filter below it. That should be a carbon stage. A lot of units use a carbon stage after the DI
stage to make the water taste better. You don't need this for the fish. Should not be causing what you are seeing though.
maybe take you membrane out and make sure it is seated correctly in the housing. Again, should not be an issue but ...
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,