So i had a hermit crab in a nicely sized tank but recently I have gotten 3 others and moved him into a huge tank with the others. My betta had been placed in a fish bowl and I would like to put him in a bigger tank so as he can be happier. I am wondering first of all whether or not it is safe to put my betta in the tank formerly used by the hermit crab if it is thoroughly washed and sanitized/cleaned out and whether or not I can keep the light that rests of top of the tank. I love my betta to the world's end and dont want to take any risks with him so as he is not injured or becomes sick. :shock: Thank you for your help!