My fish are escape experts, anyone else's?

Kuhli loaches man, kuhli loaches. They hide so well! I have some and idk if they are even still alive, I haev not seen them in a week, i have a feeling if I lift up this large ornament they will be under it, that is where they where last time I checked. Also, unless your tank is at least a 20, those gouramis are gonna fight, to help stop this you can add lots of plants and hidins.