I have 2 3/4 inch assassin snails in my 29 gallon. I am overrun with mts but they ahve done a very good job with them. I finished up my water change a while back. I was doing a gravel vac and I go deep into it. I almost buried one of them. I am now worried about burying them when I'm doing a water change. I have a 5 gallon tank with only a betta and a few mystery snails and a few ramshorn snails. I could easily move them over to another tank. I could then move the assassin snails toe the 5 gallon and move over a handful of mts when they run out of mts to eat. Should I move them or should I just be much more careful when I am doing gravel vacs?