Animal Stories - Knifefish


Animal-World info on Black Ghost Knife Fish
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Sophie - 2010-02-12
Hi, I've just bought a 4inch knife fish, it's in my 190lt tank. He's with a clown loach, yoyo, pleco, cardinal tetras, harlaquins, and minnows. Was it a bad idear everyone seems fine at the momment. Please messege me sophie=price at symbol msn . com many thanks

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Taryn - 2010-02-07
Hi, Well I have two black ghost knife fish at the moment. I must say they are awesome and very amusing to watch. My first BGK fish is about 9 inches, I bought him when he was just over 2 inches about 9 months ago. He lives in a 42 gallon tank with lots of plants and drift wood, eventually will be moving him to a 6ft tank, but for now he lives with a bunch of kuhli loaches, a pleco, a whiptail and a whole lot of cherry shrimp, all of which he leaves alone. He loves bloodworms and all other live/frozen food which I give as a treat, but he mainly eats sinking carnivore pellets. He will come out at any time during the day or night. My second BGK fish is currently living in my discus tank, she is only 3 inches and eats anything mainly carnivore sinking tablets and flake food. She is living with 3 breeding discus pairs and always leaves the eggs alone. She mainly comes out at night as she is only new. I've had her for maybe 2 months now, but she is getting more adventurous. She will also move to another tank in the future. In conclusion the Black ghost knife fish are awesome fish to keep. They are the first fish I have had. So as long as your willing to do the research I do not think experience plays a big roll in keeping them.

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J - 2010-02-01
Kyle, Plecos and bottom feeders are included in that... they are bottom feeders and they count as fish. Yeah, it is over crowded with a freaking 10" pleco.

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Z. - 2010-01-19
Kyle, your 44 is overcrowded. The 1" per gallon rule doesn't hold true when dealing with large fish - it simply doesn't account for the amount of waste produced.

I agree with Koop. Rehome some of your fish.

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Animal-World info on Zebra Knifefish
Animal Story on Zebra Knifefish
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Chris Durgin - 2010-01-18
I was wondering where I could buy one of the Zebra Knifefish at, because I really want one. Any tips on where I could buy one, they seem small enough to put in a 55 gallon. I want to see him grow into the tank and again if you know where I could at least order one online or anything let me know.

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  • Todd Appel - 2010-04-11
    There's a curent auction listing for them on aquabid.com
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Animal-World info on Black Ghost Knife Fish
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Tommie - 2009-12-29
I have a 29 gallon tank with quite an assortment of fish ranging from bettas, sharks, dragon fish, and one ghost knife I call my queen. She is beautiful and seems quite content. although she stays hidden during the day she comes out at night and eats from our hands. She is definitely my favorite!

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kyle - 2009-12-27
My 44 gallon tank is not overcrowded. Firstly most knifefishes never grow 20 inches in aquariums, that twenty inches is based on a wild caught specimen out of the spacious amazon river. Secondly, have you heard of the inch per gallon rule. Every inch of fish needs a gallon of water. Tiger barbs and flying foxes grow three inches long; 6 total, times 3 inches equals 18 inches and a required 18 gallons of water. The 18 inches of the barbs and flying foxes and the 12 inches of firemouths and the 5" knifefish puts me not only under the limit according to the inch per gallon rule; but allows the knifefish to grow to a length of 14" long. Thirdly, knifefish are one of the slowest growing species of freshwater fish in the world. It will take years for my knifefish to even reach 14" in length. By the time he reaches 14", almost everything else in my tank will be dead. That's how long it takes knifefish to grow. I bought mine over two years ago when he was just under three inches long. That is an inch per year growth rate. And when he does get long enough, I have a 200 gallon tank with oscars he can move into. I am just growing him out in my more peaceful tank until he is big enough to live with some oscars with out getting eaten. Lastly, bottom feeders like plecos don't count towards the space required for the tank. Check your facts before criticizing someone who has 25 years of experience with fish.

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mckenna - 2009-12-02
I have a 350 gallon tank with a small amount of fish. I have 3 dragon gobies that seem very timid and 3 ghost fish that only come out at night. I'm very fond of this type of fish but am having trouble finding out other types of fish to put in it. My oscars and parrots oddly get along great. I need some suggestions on other fish that will get along to put in my tank.

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Koop - 2009-10-10
Woah your 44g tank is way overcrowded! The knife alone will get 20". You need to rehome some fish.

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Josh - 2009-09-02
I got two black ghost knifes a year ago and they get along fine. I've been feeding them frozen bloodworms and they've started eating out of my hand. They seem to have gotten used to the light, now it looks like they couldn't care less if the lights are on or off, but when I turn off the lights, they immediately rush out of their caves and swim vertically along the top of the water, looking for food. Most awesome fish ever!

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