I have had this guy since Aug 2009. He is about 18" and he used to eat smelts,shrimp,scallops and the occasional feeder. This past week he has stopped eating. Before he would eat 6+ smelts and would always be first to the glass to eat. Now he just sits in the corner and once in a while cruises around the tank. He lost a tooth a couple of weeks ago but it came back same as it always does. The only difference in the last month was I had to raise the heat and put some salt in the tank as a precautionary as I accidentally introduced some feeder fish with ich. I since lowered the temp back down and kept doing my couple water changes weekly but other then the temp change and salt nothing else has been changed.
The tank is a 450 gallon with 8 rays,2 black arowanas,mbu puffer,3 lenticulata pike and a tigrinus cat. I do weekly and sometimes twice a week water changes. Tank has been set up for a couple years now and has sand a little bit of gravel for substrate. The sump is a 145 gallons loaded with media.
I am going to pickup some prazipro as thats about all I can use in the tank with the rays. I am thinking he may have picked up something from always eating frozen food and maybe even picked up something from a feeder fish that I drop in once in a while to keep the fish on there toes!
Does anybody have any ideas out there?

The tank is a 450 gallon with 8 rays,2 black arowanas,mbu puffer,3 lenticulata pike and a tigrinus cat. I do weekly and sometimes twice a week water changes. Tank has been set up for a couple years now and has sand a little bit of gravel for substrate. The sump is a 145 gallons loaded with media.
I am going to pickup some prazipro as thats about all I can use in the tank with the rays. I am thinking he may have picked up something from always eating frozen food and maybe even picked up something from a feeder fish that I drop in once in a while to keep the fish on there toes!
Does anybody have any ideas out there?

