tankyou;648691; said:Probably something not able to add to my 220 gallon aquarium huh? Aren't they good in tropical and cold waters?
walls;652047; said:Nice fish!
Now for the bad..........
1. It is a cold water fish and making him adapt to the tropical temps of the tank is "wrong" and will eventually stress him/her out.
2. IMO you took a huge risk putting that fish in with your established fish. Who knows what pathogens you have now introduced into your tank.
3. KOI generally do not thirive in a "tank" environment. I would suggest putting him back in the pond/pool he was in.
Not flaming just voicing my opinion.![]()

Please remove his ASAP even though he seems fine, Koi are a temperate fish that get HUGE. They need a pond that has 350 gallons of water per Koi to be happy. This is a 3 foot beast that gets pretty thick so a pond would be the best bet. If you can keep him in your pond, do that, if you can't find someone who will. Good luck with everything, he's really nice looking.