I got a 29 gal tank with about 3-3 1/2 inches of eco complete in the bottom. I hear trumpet snail are great for keeping the substrate churned by digging in it. I was just wondering if this is absolutly necessary? Will i run into problems later on if I dont stir it up everyonce in awhile or dont put snails in there? Second i keep hear conflicting reports on weather MTS will over run a tank. Can anybody with a few please comment on this? And how bad will they affect my tanks bio load? I think it would be cool to have 10-20 in my tank not 100-200. I just want to make sure there not more trouble than what there worth. Lastly would anyone be willing to send me a couple for a few dollars?