Otos DO NOT get big. Maybe 1.5 to 2 inches. But then again, they enjoy being with 3 or more of their kind so it will be difficult to house that many. Snails are a good choice but don't get apple snails because they get huge although they don't reproduce as easily as most. Trumpet snails are good because they turn over substrate, nerites are good too, I have ramshorn and pond snails, they stay small but they can over populate a tank.. Bettas do enjoy them ask a snack though. So that can help population control. :) And if they do overpopulate an assassin snail can take care of them in no time!
"You are forever responsible for what you have tamed."
Betta love: it's an international thing.
Azure, Sterling, you will be with me forever. Peaches, my crazy girl, I'll miss you the most.
The Boys: Tranny, Inky "Yume" Zuko, Mao, Onishiki, Chopin, Maelstrom, Kabuki
The Girls: Kamikaze, Beeuty Qveen, Beefcake!, Chunkers, Awesome Sauce
Meeces: Koko, Bijli, Baadal, Barkha
Turtle: Hi Handsome (female -__-)