Hi I'm new to Monster Fish Keepers and I was wondering if anyone had any past sturgeon keeping experience here. My dad had bought a 5 foot sturgeon from a Japanese supermarket and let it go in his 2,500 koi pond (after much reviving which I think I'll go into another time). He says that the sturgeon will just eat snails and critters in the algae. I know that this much is true, but I doubt that a sturgeon this size can stay on snails and insect larvae forever. I was wondering if there was some other food source needed to raise sturgeon, such as fiddler crabs and the like, as there is nothing online that mentions a food source that can be home raised. I'd really like to be able to help this sturgeon recover (he was neglected in the supermarket) and keep him alive because he/she is really friendly, sticking its nose out of the water and going for the occasional pat. Any help would be much appreciated 
Wish I was in San Francisco seeing all that.