I can soak food or even the coral itself in Restor. It’s aminos and fatty acids supposed to help with LPS bleaching from fragging, but I imagine it would help for any “stress related bleaching”I've heard of people nursing acanthos and scolys back from full bleaching and significant tissue loss using this approach. Hopefully it's just the slug and not some other issue. Given that you found the slug the way you did, I don't think that's crazy.