So, is the leak fixed now?

No, we have not yet gained access to the private area where this leak is believed to be. And I think we are unlikely to get it. 😄

what’s the composition of the green dye

This dye is Fluorescein Sodium (fluorescein disodium salt). It is widely used in molecular biology because it has fluorescing properties and is safe for living tissues. It is injected into living organisms, for example, to identify antibodies. Animal tests, which I consider absolutely cruel, have shown that this stuff is reasonably safe. If this sentence did not sound terrible, but:

Fluorescein was not embryotoxic or teratogenic when administered at high doses by gavage or injection to rats and rabbits.

And did the fish also turn green?

No, but it would be cool. 😆