I've had my betta, Sombra, for two months now and today i relocated him to a new 10 gallon tank in hopes add some other kinds of fish in with him soon. When I filled up the tank, these tiny bubbles formed on everything in the tank(even a few are on the marimo he has). I don't remember this happening with the tank I had him in before, but I'm not sure. Is this normal? Is it safe for him to be in?