I bought a black moor goldfish about a month ago, and he's been doing pretty well. I've been keeping him in a fish bowl until I could save up to buy him a tank. Well, I got enough money for the tank, so I went and bought one at Wal-Mart. It was a really, nice, roomy tank. A filter, air pump, light, hood, all that good stuff. I set it up, and it worked perfectly. I put the drops in, and I also put a ick clearing tablet in the water, 'cause he had had ick for about the past 2 days. I let the water sit to get to room temperature. After about an hour, I put him in the water, and he seemed really happy! After a while, I came and checked on him, and he had turned almost completely gold! I had read in a book that sometimes they turn gold when they get older, so I was just like that's cool! I came back a little while later to feed him, and I immediately knew something was wrong. He was laying on his side in the bottom of the tank. He's dead now. What in the world happened to my dear little fishy?
Was it the ick? Am I a horrible owner?!?! I've had other bad experiences with fish, but I REALLY do not know what happened this time! Please help me. I really don't want to be classified as a fish killer.
Do you have some tips? what did I do wrong?

