Trapping is real easy and the best option. It's kind of like algae control. You don't want to go out and get a fish just to take care of a problem. You want to solve it.

Pond snails are a nuisance but can be managed pretty well with routine traps. I do it all the time myself.

Two ways and I'll start with the easiest by experience:

1) Blanched zucchini. After a few days, its all mushy, mushy and completely covered with snails. Get out the ole gravel vac and suck the entire zuc out snails and all.

2) Trap (the best way). Take a 20oz soda bottle and wash out well with hot water. Cut the first few inches of the top off. Right where the bend of the neck starts. This will give you a funnel. Placed blanched zucchini, lettuce, spinach, etc. in the bottle. Invert the top and push it in. Presto...instant snail trap. Can be used any time. For best results, place in the tank when the lights go out. Check trap in morning and dispose of contents properly. Bait and reset. Within no time, your snail population will be under control.

Hope that helps.