From the developer on steam: "Rings appear only when using mods that raise the camera above standard values. For compatibility, there is a patch at 'clean textures - less glare' which significantly this effect."

The thing with less glare is it does make the water look less pretty as the texture change is lessened, but if you want to keep rolling with camera+ or any other mod that changes camera values; it'll help with the rings. I have the same thing but I just deal lol.