Customer review;  "Another item that has several uses. I've used mine for isolating sick fish, removing bully fish for a "time out", putting new plants in it until I have time to deal with them, and putting filter media in it so it could be seeded ready to use in a new tank. I've even used it to give my Betta a "holiday" in a large tank while I stripped his home. Always handy to have on hand in case you suddenly have a sick or injured fish which needs peace and quiet. When not in use, it folds flat." Flash Wilson