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Old 01-02-2011, 10:35 PM   #1
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population control fish?

Hello,

I am concerned about an over population of marigold sword tails in my 75g heavily planted tank. It's not an issue yet, but I'd like to do something now before the other fish are lost in a sea of orange and yellow. Could I find a fish that might be aggressive enough to cut down on the fry and sniff them out of all the leafy hiding places?

My current stock contains 2 SAE's, 2 zebra loaches, 1 emerald cory, 1 black molly, maybe six neons (the neons are getting old and have been dropping off every few months), around 10-12 swordtails,and about 8 silver fin/similar tetras. The community is such that there is no fighting or aggression at all. I keep the tank very clean and the nitrates at around 10 at any given time. It's run with pressurized CO2 if that matters.

I'd like to find a more natural solution than bagging swordtails and dumping them in a LFS. Any ideas? I thought tiger barbs could be an option after my neons all finally pass on, provided I get some that are young enough.

Thanks for the advice!
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Old 01-02-2011, 10:42 PM   #2
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If you can sale them off... why not?
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Old 01-03-2011, 12:25 PM   #3
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If you can trade the fish at the LFS, I'd keep doing that. If you're just donating them, I can understand wanting a predator.

The small tetras present a problem. I'd suggest a pictus or a raphael cat, but they'll also eat the tetras. I lost several full-grown guppies to my cats.

Maybe you'd consider rainbows? My praecox rainbows are voracious eaters, but they have small mouths. One did choke down a waxworm, but I think that's the biggest thing he could eat.
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Old 01-03-2011, 02:06 PM   #4
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Anything that will prey on the fry will prey on smaller fish as well. Personally, I'd add a single adult angel and let things shake out.
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Old 01-03-2011, 06:49 PM   #5
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I'm not at all familiar with rainbows but will look into them. I've heard horror stories about angels tearing up planted aquariums, though I agree it would be quite a spectacle to watch! Thanks for the tips.
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Old 01-03-2011, 07:10 PM   #6
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Just thinking i wouldnt go for an adult angel maybe a smallish one that wont eat the Neons and other Tetra
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Old 01-03-2011, 07:23 PM   #7
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I would get a angel.
I have never had problems keeping angels in planted tanks. If you get a juvi angel, it should not be a problem keeping it with tetra. Because the tank is planted, then you may not have problems when the angel matures. I keep angels in a heavily planted tank with CPD, and Dario Dario with no problems.
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