Here is an off-topic Sale; for any aquarium owners with a snail problem. They eat other species of snails (which multiply fast and take over aquariums). These assassin snails multiply much slower, with only a few new ones popping up here and there. I originally bought 3 snails for $5 at the pet store, and they single handedly took out dozens of pesky pond snails I got from live plants. I probably have like 20-30 assassin snails now after 2 years.
To add, these guys only eat other snails and left over food bits they find in the substrate. They will not harm fish and shrimp. These snails however, do not eat algae or plants; but I have Otos to clean up algae.
FS: Assassin Snail, .50 /each.