Cyprinid tank tankmates idea. - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 15 Old 01-09-2007, 04:10 AM
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Avoid the bala shark. They can grow to almost 12 inches and more. Aside from that, they need to be kept in shoals due to their skittish behavior. A shoal of 6 alone requires you 150-200 gallons minimum.

Danios are best kept in shoals.

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post #12 of 15 Old 01-09-2007, 11:58 AM
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Originally Posted by zen242
...The guy at the store has a massive 3000 litre planted aquarium and he told us that rainbow fish love planted aquariums and dont eat the plants... But your saying they do so maybe not.
I think Dawn was referring to rainbow sharks, not rainbow fish.
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post #13 of 15 Old 01-09-2007, 04:49 PM
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Actually, I was referring to rainbow fish, but it's important to know WHICH rainbow fish.. some would do fine in your tank, others would not. As for plants, most of the larger rainbow fishes tend to chew on plants.

In regard to the rainbow shark, I wouldn't mix that with the bala. 1 shark species per tank, safer to work only with 1 shark per tank. If your bala needs to be seperated, I would consider putting him into the new tank and waiting to add a rainbow shark until AFTER the bala outgrows this new tank. Average length for a bala shark is 14 inches, so yes, it will still outgrow a 4 ft tank at some point.

Knowing that the bala is the main resident in the new tank, I would avoid the giant danios with him. They are aggressive compared to other danios, and the stress of their constant chasing would likely make the bala sick.

The habits of the rainbow shark are about the same as the red tailed shark, so all of the warnings we've already given about the red tail apply to the rainbow shark... they average 6 - 8 inches and are aggressive, territorial, and need plenty of hiding places down low. They tend to eat smaller fish, especially during the night/dark hours. They are more nocturnal of an animal, and even larger fish, if not aggressive enough to hold their own, will tend to get chewed up by the sharks.

Dawn Moneyhan
Aquatics Specialist/Nutritionist
Juneau, WI
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post #14 of 15 Old 01-10-2007, 02:07 AM Thread Starter
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Cool. Yeah the bala shark is only a temporary resident - he has another home awaiting him when my friend returns from overseas.
Last question I promise. Someone told me that Giant Danios swim fast and in a group changing direction in unison - is that true? Cheers.
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post #15 of 15 Old 01-10-2007, 08:38 PM
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It is true that the giant danios will swim quite fast, but they do NOT always change direction in unison. More often than not they spend their time chasing each other.
One of the reasons these fish are not suggested for a "peaceful" tank is because they are always moving, and fast at that. They also can be aggressive if they don't have enough of their own kind to keep the chasing going. I have found that groups of less than 4 giant danios together will tend to harrass the other fish in the tank, and can cause a lot of fin damage with their nipping.

Dawn Moneyhan
Aquatics Specialist/Nutritionist
Juneau, WI
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