Burrowing snails???

[toolisj]

what are burrowing snails and where does one get a hold of a few?

[Dave66]

Malayan Trumpet Snails are what you are after. Their eggs come in on aquatic plants often, but there are a few sites that sell the snails themselves. The species name is Melanoides tuberculata, so it's easiest to find some for sale from reputable sites by the species name.

Dave