aggressive severum

I bought myself a King Kong Parrot this morning from the local pet shop, it was the biggest amoung a tank of six much smaller parrots (4-5 inches). The tank already consists of one Plecostomus, two Koi and one Angel. My Parrot is very agressive and im not sure what to do. It gets fed blood...

hi all Due to a tank wipeout on my old 4ft due to heater failing in night and cooking everything, I have pretty much started again, upgraded to a new 6ft tank whilst at it and transferred the soil survivor a blood parrot. I added a fire eel and a large Oscar who is very mild mannered it...