Yes, i noticed that problem with underwater well too. I think whirlpool isn't necessary. I suggest this well was broken during the Finall Battle--> it's chocked up by stones and rocks.
Arangol, try not to render with those shadows effect. If you could make a render/screenshot with edges - this is what we needed now. And place in scene a red box with klyros proportions (2*1,5*1.5m) so we could imagine the scales of models.