Hi. I have a 100 gallon tank that is currently unused with a DIY epoxy background. I used to have a fantail named Goldie that unfortunately passed away two years ago, she was over six years old.

However, a 100 gallon should hopefully provide good space.

I have heard that goldfish will continue to grow throughout there lives and their organs will rupture unless they grow to full size, so this is the minimum I'd feel comfortable.

how big will a pair of Sarasa comets get in a tank this size? Is it better to just have one? I estimate a single Sarasa or feeder goldfish would get to be about 15".

Is that too tiny? I have heard they grow full size at 20".

What about a single or a pair of fantails?

And here's something interesting. What if I need to move eventually? How do I transport to another state a fish that big? A large rubbermaid container with battery air stone?

Thanks!

Lol i've never ever heard of a fish rupturing because their organs grew out there body! Maybe that would be a good thing to tell people who are trying to put goldfish in bowls!

With your comets, i reckon you could house 2 comets very very nicely. With fantails you could keep even more.

We here at koko's generally like to follow the guideline of 10g per fancy goldfish (so your fantails would come under this) or 15-20g per slim bodied goldfish (comons/comets). So having 2 in a 100g gives them 50g each!! But the more room the merrier your fish would be, but they wouldn't explode!

And for your size question, Bruce, the biggest goldfish known to man (or that we know of) and is only 17inches, so i doubt your gonna make your fish get to 20inches...

And for transporting, I use plastic tubs for transporting my fish, so thats fine At least they have lids on them so the water dosent go everywhere!

i think svenden, has said all that needs to be said to be honest.

depending if your tank is 100 gallons, ( uk. or usa ) will depend on how many fish you can put in it. as gall0ons in 0america is more than in the uk.

Personaly. if it is a 100 gallon, ( uk terms ) then id probably house 5+ goldies in it. that will give them plenty of growing room.

provideing you keep the tank well filtered, and regular water changes will able you to house more fish.

Hope thats any use to you

It is 100 US gallons

I have read somewhere on the net (and heard from a friend that worked at Petsmart) about the rupturing thing from keeping the fish in bowls or too small of aquaria because the organs will continue to grow and shorten the fish's lifespan.

Have you taken your fish to another state? Like I said, I think a battery powered air pump, the largest rubbermaid container I can find, and a Uhaul van could help me transport my fish and furniture to another state if I need to move. A fish over a foot and a half long certainly cannot be transported in a fish bowl!

My old fantail goldfish, Goldie I miss pretty much. Had her for over six years in a 10 gallon. Had a chronic problem with finrot and finally she couldn't swim much anymore and I had to euthanize her. I cried.

I'm a bit more determined this time to get things right, but moving is a problem if I need to eventually.

Will goldfish eat java moss? I have a DIY epoxy background i'd like to mount some T5 HO or metal halides (and perhaps CO2 canister) to grow some nice plants, but from experience C. auratus can strip many fine leaf plants bare (at least Goldie did).

Re-transport, battery powered air pumps use an awful lot of battery power. I used one once and it only lasted an hour-no kidding. Watch out for that.

How exciting an empty 100 gallon tank and lots of ideas!

Trinket, you must have gotten a hold of a defective battery powered air pump or a bad set of batteries. I've used battery powered air pumps for years transporting live bait for fishing trips and the batteries have always lasted at least 24 hours.

Doug, there's a lot of info in the goldfish plants section that should help you choose some plants that goldfish won't eat for dinner.

Here's a link to get you started
http://www.kokosgoldfish.com/Plants.html