What's the ideal sized tank for these fish?

Question

Right. first things first. the fish. there'ss 3 goldfish and a shubumpkin. my comet recently died of unknown causes (probobly the ammonia in the POND!! [hint hint, they live in one]) and one of the goldfishes has a bruise on its head. they live at my dads house, and i go there every thursday and friday, and i saw the bruise yesterday- it wasnt there last week so i dont know how it got there.

anyway. i want them to live in a tank in my room. i have plenty of space, the only problem is cats, and my dad usualy shuts them out pf my room anyway. (we have 2 cats). how big should the minumum size be, and how can i adapt them from pond life to tank life? theres no filter in my pond, and i just feel so bad for them. whenever i ask my dad if i can keep them in a tank (i will buy it, the filter, weed, food, filter booster, stones, all that stuff) he says ask lise (his girlfriend) and she says theyre perfectly happy. i say 'no theyre not, theyre in a tiny pond full of grime and mud, with cats roaming (they caught one once, but he's still alive!) and food only one every 2 days in ammonia dreched water!' so thats my second problem, how do i convince my dad and his girlfriend to let me keep them inside? we have 2 cats, my almost 2 year old half brother (whos always there) loads of stick insects and mealworms, but none of them LIVE in my room. (at my mums house i have 4 danios in a 15 gallon tank, so i know a bit about tank management =])

HHHEEEEEELLLLLLLLLLLPPPPPP!

i feel so bad for them, adn want to make their life worth while!

thanks every one =]

Answer 1

Gold fish need a minimum of 20 gallons for EACH fish. You would need a MINIMUM of an 80 gallon tank to support these fish. The set up for a tank of that size is going to be pushing $1000. It's expensive.

Have you done tests on the pond water? What is the ammonia level? What is the overall size of the pond?

You can make the pond a suitable gold fish habitiat for MUCH cheaper than it would be to put them in a tank.

Most goldfish can live happy full lives in ponds.  

Answer 2

well can you or a friend drive to the store?

i imaging coming home with a complete tank setup would be kind of the point of no return.. it'd be pointless to return the tank, and pointless to keep the fish in the pond

of course if that isn't possible.. taking a glass full of pond water and asking them to drink it is a very visual argument..

the 3 other goldfish are comets?

so it's 4 goldfish total?

i'd imagine you'd need like a 75 or 90 gallon tank for all of them.. it may just be cheaper to get a filter for the pond and a few more goldfish

Answer 3

So altogether there is 4 and one of them is a shubunkin (pronounced shoe-boon-kin, it is a Japanese word/name, keep pronouncing it how you want, it's just my native language hehe). I would say upwards to 100 gallons, maybe more. It's 20-30 gallons for the first fish and 10 more for each generally, but one is a shubunkin and they get to be 2 feet long. You should explain how predators can attack the fish and how an aquarium would be easier to monitor. If there is a lid on the tank, there is no concern for the fish because the cats can't get in. If anything it would be a threat to the cat...Haha. Just make sure to cycle your tank for at least 4 weeks before moving them so the beneficial bacteria can build up : )

EDIT:

To save some money look on craigslist in your area. I got my 50 gallon brand new with a stand for $200! Originally $350!