Join Date: May 2011
Location: Elk Grove, California
Bettas are so curious. Okay, to be honest? Bettas will mouth their own poo, just to see if it's food. It's not all that unusual for them to mouth the snail poo to see if it's edible. It's sort of a curiosity thing, especially since he is spitting the poo out.
I am not certain if the snail poo can contain parasites or other organisms harmful to bettas but I'm inclined to say no. Again, not certain, but I think any parasites that affect a snail would be specific to mollusks.
You are feeding a fine amount, don't worry about that. :)