I did it! I brought my 3 large snails to my favorite Petco, and gave them to the kid on fish duty. He has tanks, and was so thrilled with the snails! I hope he takes them home himself. I also bought a high-quality Fluval filter for a 30-50 gallon tank. The one that came with my 29 gal is junk. I ordered some ramshorns from ebay and also got a free one from this Petco; ther was one in the tank that may be too big for a betta to eat (right!)
4 bettas: Butch, 3-year-old violet male PK EE & 3 girls in a 30 gal sorority. I do not name the girls anymore! 1/2 of them die within a month.
30 gal: 9 Oto cats, 4 Ocellifer cats. Inverts: Cherry shrimp & 2 assasin snails.
10 gal.: Butch, his 5 oto cats, 3 assasin snails, and a few snails the assassins haven't caught.