I lost a male leopoldi a month ago probably due to chlorine poisoning. Another leopoldi, a female, has gone on a hunger strike for about a month now. I have tried to feed her mp, fish, squid but she just goes thru them without feeding. I change 25 pct of the water every monday then another 10 pct on fridays. My ammonia is 0, nitrite is 0 but nitrates a little high at 40. I have cleaned my sump and recently been changing 10 pct of the water each day to stimulate her appetite but to no avail. anyone has any ideas on how to make her quit her hunger strike ? another ray and arowana inside the tank is eating normally. by the way, how long can rays survive without feeding ? thanks guys ...