If you are going to get a used tank, please make sure that you disinfect and sanitize it before putting your new babies in it. A couple of washes and rinses with Clorox will help. You have no idea what was kept in the tank previously or how they went "belly up"... this is for all the accessories, etc. You may want to just get new plants if they were included because the bleach sometimes is retained in the plastic, and that will kill your fish. Dry in the sun to make sure it it sanitized well.