https://eheimsupport.zendesk.com/hc/en-us/community/posts/38913091091091-how-to-close-%EF%BD%92%EF%BD%8F%EF%BD%82%EF%BD%89%EF%BD%8E%EF%BD%88%EF%BD%8F%EF%BD%8F%EF%BD%84-account-FoLLoW-ThE-ProMpTs