Yes, I had an aquarium set-up however, it was arranged as a vivarium with about 30% land (islands) and branches throughout. The islands where plastic containers weighted with rocks, topped with sand and lids with holes cut into the sides above the water-line (simulating caverns). Others where same construction with flower pot dishes on top also filled with sand (open sunning spots) and again some had flower pots, planted with ivy, etc.
Branches rose from the water or where "rooted" in islands.
The snake spent 80% of his time in the water at least during the day when I could see him (I was at work most every day so ...).
I'm sure that like our water snakes, the majority of time was spent sunning and that being immersed for long periods would not be good for Lycodonomorphus as for Nerodia. At least, allowing this would risky.
Michael