I'm currently in the middle of rescaping my tank. I have minimal plants & lighting in a 30G while I wait for a shipment. I currently have, among other things, 3 otos and a (pond?) snail. They like to usually stick together, but when I try to feed the otos lettuce, the snail gorges on it. Also...

I am kinda surprised by this, but I have seen it up close many times. I have a habit of crushing those tiny ramshorn snail all over my tank, on the glass and rock, and almost everytime after I crushed the snail, the oto would go and start sucking up the bit and pieces on the rock or stuck on...