Black ghost knife question - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 5 Old 08-28-2012, 05:24 AM Thread Starter
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Black ghost knife question

So im' going to upgrade to a bigger tank (90 maybe 100) i was thinking of getting a Black ghost knife when i upgraded, currently in my 55 i had 5 giant danios, 3 glass catfish, 5 tiger barbs, 6 mollies ( 3 black 2 dalmation 1 gold dust) 2 red wag platies, red tailed shark, blue crayfish, ghost shrimp, fiddler crab, chinese algae eater, 5 kuhli's and 1 stick catfish. WIll the BGK be aggressive? will it be enough room for him if it isn't? If not could i go with a dinosaur birchir eel instead? or just drop the eels altogether and get some more communities?

Any help is appreciated!
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post #2 of 5 Old 08-28-2012, 05:45 AM
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Welcome to the forum

That is quite a collection of fish in there..... I would be afraid that adding anything else might disrupt the balance. Truthfully, I'm concerned about the combination of fish you already have. The ghost knife grows quite large - too large for a 90, though a 90 would be a good grow out tank. From there you could upgrade to a 6 foot tank. I would also skip on the bichir.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #3 of 5 Old 08-28-2012, 12:24 PM
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Congrats on the big tank and welcome to the forum!

I don't think a black ghost knife fish would work well in there. Well unless you wanted to get rid of some of your fish. Knifes are predators and will eat anything that can fit in their mouths. Those kuhlies would probably be first on the list as they are so slender.


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post #4 of 5 Old 08-28-2012, 12:56 PM
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Agree, a BGK is not suitable, more from the opposite though; the existing fish would harass it to death. BGK are very demanding in their environment, as it explains in the profile: click Black Ghost Knifefish.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #5 of 5 Old 08-31-2012, 10:22 PM
With the stock you have I'd be concerned about putting any kind of Bichir in there. Bichirs are predators and while some of them (like mine) refuse to eat live fish (well the senegalus at least) you may not be so lucky.

When your bichir starts to grow fish may start going missing.
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