quantum aquatics

Ive been wondering if i could put Nerite snails and/or amano shrip with african mudskippers. i think they might get eaten by the mudskippers but im not sure. Anyone ever try this? Would really like a clean up crew for the tank.

So I am planning on getting a 210g tank for my amazon puffers and a few other fish from Peru. I was wondering if I could put a Oscar with them? I have looked everywhere and can't find out one way or the other or anyone that has ever tried it. so has anyone tried it? is it a bad idea? or is it just a try it and see and have a backup plan if it doesn't work?