They are about 4-5". We feed them smelts and shrimp mostly. Its pretty easy to pick their food up at the grocery store with our regular groceries. XD Just pop them in and thaw them with warm water and they go nuts for them. Especially the shrimp. The feeders were sort of a treat. They never really get them but they like to chase them and scare them.
I am not sure of the brand or size but it is a bio-wheel. The lady we bought the tank from bred koi and so the tank and filter came together (amazing price too she was really eager to get rid of it).
I am not sure of the brand or size but it is a bio-wheel. The lady we bought the tank from bred koi and so the tank and filter came together (amazing price too she was really eager to get rid of it).