Correcting starboard list

[furball]

Ric, I have the standard TE seating setup. The original owner installed 2 4D AGM batteries. One on the center line, just in front of the fuel tank bulkhead. The second is on the starboard side and it seems to be heaviest single item but the water heater, waste tank, battery charger, electronics, head of course. I hope to ride in a engine box version at some point, see the differance in ride. It's a lot of weight to move around, has to have an effect.
John

[Mariner]

Our 36' floats level at rest and usually when underway. But when the fuel tanks get a little low, and you're at reast, if you load up on passengers on the starboard side, it will list a little. But then, as the fuel shifts from the port tank to the starboard tank, the list gets more pronounced until a cup placed on the table will move with each bump or vibration until it slides right off the side.

Closing the fuel valves works as it keeps the fuel from shifting, but who wants to crawl down there and do that every day?

I find it odd because despite having had boats with similar tankage setups before, we've never had this problem.