Sneaky Slug!!! What do do about potential others

[astrid]

Hello everyone!

I kept noticing a hole here and there on my den nobile. I had repotted it, so I thought that there shouldn't be any issues with the media or any little hitchhikers who came along for a snack.

Unfortunately, I was wrong! I noticed another little hole in a new keiki growing on the plant, so I unpotted it and found the culprit!! A nasty little slug! It was a quick bugger, too. It immediately ran to the plant and I threw it all away, slug included with his last meal.

I haven't seen any slug or snail trails. I haven't noticed any signs of damage on any other plants, and the den nobile was on the lowest shelf by itself, away from other plants. However, I have my den antennatum in bud now, and I noticed two new roots seemed to be bitten off. However, there are 5 times as many new roots that are not bitten off, and I don't see any slugs or snails in the pot. No slime trails. They even left the supple fleshy green new growth alone.
I am soaking the plant in water now probably until evening so hopefully the little bastards in there will come to the surface or drown.

What else should I do?
How do I eliminate them in my small home collection? How do I even know they are there if I can't even see slime trails on anything?

I am going to feel paranoid that my other plants will have slugs!! Argh– little monsters! I repot all my plants and I try to remove every last little bit of media and visually inspect the roots, but apparently slugs are sneakier than I ever thought! Argh!