Goldfish!!!

Lupin

Only one. I don't think you should risk using pond water. Too many risk are involved there. External parasites such as fish lice are quite common in ponds.

Zephyr

After doing some research and averages, I've found that I can safely assume that these are the following maximum lengths for the listed Goldfish *rounded up to the nearest tenth*:

Bubble-Eye/Celestial Eye- 4.3 inches.
Black Moor- 6.2 inches.
Oranda- 9.5 inches.
Ranchu/Lionhead- 3.5 inches.
Pearlscale- 4.1 inches.
Ryukin- 6.5 inches.
Fantail- 8.5
Vieltail- 4.1 *excluding fins*

Therefore, I can conclude that not only is each breed of Goldfish different, but also that many people who group fancy Goldfish into one size class are wrong.

I have made the executive decision to raise one group of the following in the 30 gallon tank, based upon my findings:

Bubble-Eye/Celestial Eye- 3-4
Black Moor- 2
Oranda- N/A
Ranchu/Lionhead- 3-4
Pearlscale- 3-4
Ryukin- 2
Fantail- N/A
Vieltail- N/A

mHeinitz57

like i've said, most fish people are going to suggest being conservative with Goldfish just because the average person will overstock a Goldfish tank easily. It looks like you have done some good research though and are still staying pretty conservative...so well done

Zephyr

I was surprised at the oranda sizes I found.

mHeinitz57

i've actually heard of them getting up to 12 inches but even 9 is quite amazing.

lioness501

i love the pearl scales! they r sooooo cute!!! i have my goldie in my tropical tank, alot of people go against that, but hes a happy fellow! good luck with watever u decide to do!

Zephyr

It's gonna be hard to pass up all the tempting little fantails at the LFS though, but the leetle guys will turn into beeg guys in no time.

Zephyr

Now that I think about it, alot of Goldfish breeds are mixes. *Oranda ryukins, fantail oranda* so if I were looking to purchase a mix breed, maybe I should average the sizes of the pure strains to get the maximum length.