How do you know when a fish is dying of old age or is there no real way of telling? I have an anostomus anostomus that I bought 2-3 years ago after seeing it in a tank at my local fish shop for close to a year. The price got good enough I had to go for it. Now it appears to have stopped eating and is getting pretty skinny looking. Still has good colour though which I thought was strange. Has this fish just reached the end of the road or is there something I should be doing?
