Called the pet store, they said the bala shark will get as big according to the tank. If he gets too big, i'll just sell him..or i'll just go all out and get a fuggen huge *** tank!
This is a sad myth that many uninformed people believe--including many people who sell fish.
Fish do not adapt their growth rates to accommodate being in a small tank. Rather, they become deformed and stunted.
For example: "
It simply is not true that fish will only grow to fit their tank. This is an 'old wives' tale' and one of the most common, and sometimes most frustrating,
myths about fish keeping today. This misinformation is perpetuated by the fact that most fish will die before they visibly outgrow the tank they are housed in. This early death is unnecessary and can be easily avoided by providing enough
space for the fish to reach full size, along with
proper care for the fish and their fish tank." --
http://www.firsttankguide.net/size.php
You can read about this issue at many other websites:
"Fish only grow to the size of their tank: This is possibly the most common myth I hear, and I know many stores still tout this as truth. however, it is untrue." --
http://www.firsttankguide.net/myths.php
"[FONT=Arial,Verdana,Sans-serif]
Realize that the myth 'the fish will grow to the size of the tank' is just that, a myth. A fish’s internal organs will continue to grow long after its body becomes stunted by the release of growth inhibiting hormones. This results in a painful, slow death for the fish." -- http://www.aquariumpros.com/articles/research.shtml[/FONT]
"I know there are some people who say that the fish only grows to the size of the tank but this is simply not true." --
http://www.ehow.com/how_5862381_choose-right-fish-fish-tank.html
"
Myth 1 Goldfish only grow to the size of the tank. This is a common myth, but it is also entirely wrong. Saying a gold fish will only grow to the size of a tank is like stuffing a kitten into a jam jar and saying that it will only grow to the size of the jar, or binding a young girl's feet and saying they will only grow to the size of the binding. It may be true in one respect, but in reality, what you're doing is unnaturally stunting the fish's growth and killing it early."--
http://hubpages.com/hub/My-Goldfish-Keep-Dying-A-Guide-To-Keeping-Goldfish-Without-Killing-Them
http://www.badmanstropicalfish.com/forum/index.php?topic=9743.0
For a picture of a deformed fish:
http://www.aquaria.info/index.php?name=News&file=article&sid=363&theme=Printer
And, here's some info on bala sharks:
"It is a freshwater species, with a maximum size of 14-16", and it is commonly kept in larger aquariums.... It is frequently sold as a small juvenile in pet shops and many buyers do not realise exactly how large this fish can grow and how large the aquarium must be." --
http://www.aquaticcommunity.com/sharkfish/balashark.php
"Very common in the hobby today the bala shark should be researched before purchased. They grow very large and fast and prefer to be kept in groups." --
http://badmanstropicalfish.com/profiles/profile21.html
And, goldfish:
"This should be a minimum 30* gallon for the first fish and 20 gallon for every goldfish thereafter. That's right, a 50 gallon tank (180 liters) is only enough for two goldfish. At this point you might decide to keep a different sort of fish, and I would say that this is quite a good idea. Goldfish, in spite of their popularity, are one of the more demanding types of fish to keep. They can grow up to 18 inches, (almost 50cm), so stuffing one into a tiny bowl and thinking things will be okay is not an option." --
http://hubpages.com/hub/My-Goldfish-Keep-Dying-A-Guide-To-Keeping-Goldfish-Without-Killing-Them