Thanks for the reply. I check the water at the kitchen sink faucet, since I don't have a sampling tap.
I tend to run the watermaker at the middle of the green zone on the guage, but the sightglass is pegged at the top of the glass. I'll start running it below 60 and see if the water improves.
Yes, the O-Rings were replaced as well as the interconnector.
Is the blue hose you mentioned accessed through the portside lazarrete?