I'm not quite sure what to do with this goldfish...?

First off do NOT listen to the very bad advice most gave you on here. Goldfish do not grow to the size of their tank. They get stunted which can result in a very short life which will be miserable for it. Eventually it will kill the fish if it lasts long to become stunted. You can do as one person said and buy a 5 or 10 gallon until it can survive with the koi or you can take it to a pet store and donate it. A fish living in a bowl it's entire life is like a person living in a closet their entire life. It sounds like you really want to do what is best for the fish so you can do daily 50% water changes until you can afford a proper tank, which setups can be very cheap on craigslist, that way you know he is safe :)

Actually, 20 gallon tanks only work for fany goldfish (double tail, shortened body), single tails (the ones with long body) need much more and they are considered pond fish.

It's great that you are trying to find a new home for Nirschl. I agree about the koi pond, I wouldn't there to put a young goldfish in there. You can try and find a local fish store that's willing to take him in. Sometimes privately owned stores are willing to take fish in, even if they weren't sold by them. If it doesn't work try advertising locally (even write some details about the adult size and expected age of the fish). Try craigslist (or the local equivalent of it) and see if you can put up printed ads somewhere (here we have a pet food chain store that allow ads).

Meanwhile, focus on keeping Nirschl healthy. I recommend doing daily partial water changes. You can use a piece of airlining tube as a siphon to remove waste from the gravel. Don't forget to dechlorinate his new water. (Don't worry about calling Nirschl him or her, young goldies are close

to impossible to sex.)

As for bowls: you can keep a Venus fly trap in there (research first, they are not very difficult to keep alive but they don't work like your avarage plants). Many people keep Bettas in their dorm room; a single Betta can live it's entire life happily in a 5 gallon tank with a lid, heated, filtered.

provide it a magnificent cycled tank, quite some nutrients and sufficient floor section to respire off the main appropriate and the goldfish could quickly be satisfied. including some Stresscoat product ought to help. Anacharis, Dwarf Anubias and duckweed can stand low temperatures that goldfish love. Dwarf Anubias isn't too tasty if it pleases you to have your goldfish munch on them, nevertheless. Tropical Hornwort is a speedy-starting to be plant that your goldfish will munch on, in spite of the undeniable fact that it fairly is going to maintain up with it fairly is enhance, so it is not long gone interior the blink of a watch

Goldfish can grow pritty large and need over 50 gallons!I would put him in with the koi and see how he does!I am very happy that you don't want your pet to die!,

Mr Random

EDIT: If a goldfish is kept in a small tank its growth will slow down and its orgains will outgrow its body!

They have TOXIC waste so the need a good brand filter!

Ok well the 1 gallon tank thing is a load of BS ok i know that for fact my mom breads fish and i raise them ok and if you feel like you are treating the fish bad buy a 5 - 10 gallon fish tank set up kit they run right around $30-$40 and last a life time and than they also come with hood filter every thing plus food and every thing you will need for about 25-35 days ok so don't feel bad your going to make a grate pet owner.

Golfish grow to the size of their tank, so a small bowl is fine is you want to keep it a small fish. be kind to it. i had a goldfish that lived to be 13 years old and would eat food from my hand and let me scratch its head.

All I have to say is that you don't have to listen to all that mumbo jumbo about it needing all those things.... a goldfish does great in a bowl or in a 1 gallon tank... :-)

Get him a female fish to mate and once they mate release them to the water that is safe and doesn't contain sharks, killer sharks, whales, crocodiles and other beasts like them, he would live happily with his wife