I have just got him today but seller said. For the first 3 days up to 1 week. There is no need to feed him . As tiger ray is not going to eat for first few day. And do not use even salt as Tiger is allergic to . Is it true ? I have run water with some black water inside for 3 days now and reduce water half tank . No salt or any other medical . I have an intention to leave him with no light for few day until he gets better. Please let me know if there is any mistake.