Hi
@Jmanc your leaves will recover fine but it's important to treat the slug problem immediately with snail
baits or better still some diatomaceous earth because not only does it deter pests it also is a natural silica source
and is beneficial for your plants 😀😀 Win Win with DE
Simply sprinkle some around the plants soil and you can also mix a qtr teaspoon with 500mls of water and spray
onto the leaves. Hope I have provided a solution to your question Mate