My fishes are dying in the aquarium tank.?

Sritej

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Jun 23, 2013
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1 week back i bought 10 gallon of fish tank[12x24].
the following are the fishes i kept in the fish tank:

1) silver tip shark of medium size[2]
2)rainbow tip shark of small size[2]
3)albino rainbow shark of medium size[2]
4)albino catfish shark of medium size[2]
5)angel fishes of medium size[2]
6)molly fishes of small size[2]
7)betta fighting fish of medium size[1]

after one day albino rainbow shark jumped out of the tank and died,so i bought a dome for it.
the next day a molly fish died.
after two days betta fish dies.
today silver tip shark was about to die,but somehow i managed it by putting it in different bowl and it escaped.
i have kept one oxygen filter submerged into the tank.
daily the water is becoming dull,im changing the water half every two days.
i put rock salt into the tank.
Why fishes are dying and it is becoming very difficult to manage.
Kindly suggest the remedies and point out the mistakes that i'm doing.
Thank you
 
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