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Old 02-27-2017, 11:35 PM   #1
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Colombian sharks laying around?

I have three Columbian sharks (silver tipped sharks) and when I first got them they were quite energetic as they were at my LFS as well.

They have been in my 55g brackish long tank for just over 2 months, they are only about 3.5-4" each and once they reach 5" I'll be moving them to a 300g tank (I'm figuring by the time they are 5" my large tank will be cycled).

Lately they have been laying on the ground in the corners or in front of one of my plants. (I apologize I don't know the name it is a red background leafy plant) is this normal? Should I be concerned?

One of them is also now being "shunned" by the other 2 as well, they will chase him off if he comes to swim with them like he used to?

None of them show any other signs of stress however. They all jump for food, no signs of damage or discoloration.

They are fed a varied diet of mysis shrimp, blood worms, wardly shrimp sinking pellets.

Fine sand substrate, plenty of hiding places and places to explore, 3-4 bunches of background plants (started plants mostly)

They are accompanied by:
An electric blue crayfish 3"
2 veil angels 3"tall 3"long (about)
1 rainbow shark 2.5"
And 1 red tail shark 3.5"

Also as a side question would it be ok to put the Columbian sharks with my silver arowana and ornate birchir?
The arowana would be larger but the bichir would be about the same size.
These would all be in a 300g tank with 55g sump.

Any input would be helpful!
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