Healing Coral issue?

[runic sand]

i saw someone else posting about this issue but I was just wondering what do I do if I can't heal this area and there's no more trash in the area or prior ones? Am I like screwed? I really like the diving mechanic of the game and just recently got the game like a week or two ago.

[plucky narwhal]

I think that the last oil will leave after that you talk too the merfold because they also have a solar machine