Yea because you're turtle will attack the floating back of fish.

I drop 10 minnows into my 50G, and they're gone in less than 10 min.

When you get fish, you float the bag on the water with the fish so temperature equals out.

http://www.wikihow.com/Float-Your-New-Fish

Turtles are very aggressive. The only exception is when babies grow up together, but that is not always for sure. If you put a baby in with him, he'll possibly get aggressive towards it and could kill it in one bite. If you get an adult, there will no doubt be an aggression issue. He'll attack the o...

No that's fine. Just for future notice: Sometimes when turtles are sick, or close to dying, they go lifeless, but are indeed, still alive. There bodies are shutting down. At this point there is nothing you can do usually. I usually wrap them in a paper tower and put them in the fridge for an hour. I...

Hope that's not a female. She'll get huge!

Her*

Even though they're feeders, still float them, don't just drop em in.

Looks like a healed wound. When turtles attack each other, the attacker comes from the top and goes for the neck. Keep an eye on it, but I'd say it's fine.

Wait...what do you mean you let him out to nature? Do you put a dead turtle with an infection in a waterway?

It's not an easy task. One mistake, and there's hundreds of gallons of water all over your house.

Stock tanks are your friend. Rubbermaid, not metal.

https://www.google.com/search?q=stock+t ... l&safe=off

He's starting to shed retained scutes. You need to let him have access to a UVB light more than just in the morning and in the summer. Also, get a filter. It's not an option.

Mine's carpet. Very thin so it doesn't retain water.

Don't feed comets. They are all fat no protein. Feed minnows.