get rid of artifacts (fluid) how to get rid of black spots (artifacts). I'm using gradient animation on water simulation 2.80 (old fluid sim.) But, when i play animation on viewport, there is no issue of black spots.
Video https://vk.com/blender_3d?z=video-947906_456245040%2F97f5a90e1d430fd5c8%2Fpl_post_-947906_987830

2nd link for video https://drive.google.com/file/d/1OChLqpIZiNyb-Mn2C6QW5Y06L3JnPBym/view?usp=sharing
The black spots seem to be the fluid intersecting the surface of the background. Try moving the fluid up. Also there is no reason to use the old fluid simulation system. Mantaflow is superior. I would recommend using current version and the new fluid simulation system. It will give you better results.