I'm doing baffles as was concerned about microbubbles when first setup (plus thought everyone else had baffles). Now that lowered flow could probably remove but why bother.

As for TDS have my ro/di feeding a float in my sump (I know living on the edge) and haven't noticed creep, though do have the reservoir tank.

What about some movable baffles then try what you like

http://www.wetwebmedia.com/ca/volume...bafflesart.htm