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Forum > The other fish > Tropical Fish & other fish not listed.
kortniee
So... I asked this question in another thread but didn't get an answer. I know goldfish are supposed to release a hormone or something that stunts their growth if its concentration in the water gets too high. Does anyone know if this also happens to any other fish... tropical or otherwise? It's not really a concern for me or anything, I'm just really curious. Thanks ahead of time.

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Raith
found one article on a specific tropical fish. http://fish.orbust.net/silverarowana.html

as far as guppies goes, i dont think tank size can stunt their growth, same with bettas.
kortniee
Hmm... thanks, Raith. That's more than I could find. Arowanas are indeed nifty fishes, though I've never known anyone who actually owns one. I did catch a couple on Animal Crossing. I gave one to Blathers and sold the rest to Nook.

Any other takers? There's gotta be some sort of fishologist who knows...

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kortniee
Alright... I found this on wetwebmedia:

(http://www.wetwebmedia.com/optgwthfaqs.htm)

QUOTE
"My babies in aquarium have a little grow, I give them a good food and I do
any work for them,
But I think They need to Hormone or Drug for further grow and fast grow,
Do you know any drug or hormone for them?
<actually the contrary is true. When fish are growing in an aquarium they give off natural hormones that inhibit the growth of each other (and themselves!). What your fishes really need to grow is more water changes to dilute the buildup of these hormones. Professional fish farmers do daily water changes to grow their fish the fastest. Artificial hormones are only used to stimulate reproduction... but generally they are not used for growth>
Please write name and address of site,
Thank you very much,
Nader


And the whole thing gives no mention of the type of fish, so I would assume that according to this site all fish have this trait. Still, I tend to like to get several opinions.
Ponderosa Power
I don't know much about this topic, but I would imagine it does to some extent. Most tropicals are smaller and don't demand as much space, so fish like guppies, tetras, mollies etc won't be stunted. If it does happen, I'd think it would be cichlids and angelfish..the bigger guys. BUT! I don't know, I'm just sharing what I would think smile.gif
kortniee
bump.gif

I'm still curious...
Ponderosa Power
me too actually!
Raith
experimentation would show you the way. also, if you know any experienced LFS, they might know the answer.
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