I now have my algae under such good control I was thinking of putting some snails in a two gallon vase along with other stuff (hitchhiker crab) because I don't want to flush them. Then I could give them away when it's convenient. Would this vase need circulation/filter if I put in live sand and rock? I would like this vase to be kinda permanent. No lighting other than natural. Need to do soon because the snails are now going after my plants. They never did before. I also don't trust any crab but blue legs in a reef. Can it be done? I'm not talking fish or anything like that. :?: