Black ghost knife fish erratic behaviour

chancefavours

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Hi,
my black ghost knife fish is approx 5 years old, and has always lived in a community tank. In the last 4 months or so, he/she has started being very active at the top of the tank, even swimming vertically with about 1/5th of his body out. He/she has even made contact with the glass lids.
Nothing has changed recently, still doing weekly 1/4 tank water changes, temp is steady at 25c, and ph sits close to neutral. Feeding twice a day with frozen blood worms, sinking pellets or flake.
I'm only going to take a guess, but maybe he has suddenly noticed his reflection ? Maybe becoming sexually mature or territorial ?
There's a pic attached, hopefully it works.

thanks !
 

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Aquarist

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Hello and Welcome to Fish Lore!

Beautiful tank! Hopefully you will receive some responses before long.

I hope you enjoy the forum!

Ken
 

TexasDomer

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What size tank is it? It looks a bit small to me. They typically require 100+ gal tanks.
 

hampalong

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Mine is the same sometimes, not breaching the surface but it does sometimes stay out in the open. I've no idea why. Water is fine. Mine is 8 years old. Electrical fish seem to have needs we don't really understand...
 

TexasDomer

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The dimensions are coming out as a 29 gal tank. Is that true? That's way too small for this fish and the clown loaches. You should consider rehoming both the loaches and the knife fish, or upgrading to a 100 gal (at the minimum). Keeping them in such a small tank can have bad effects on their health.

Also, sounds like your tank isn't cycled. Do you know about the nitrogen cycle?
 

hampalong

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Yeah, 4x1x1 is way too small for a 5 year old BG. Also Clown Loaches are not good tankmates for them in a big tank with lots of space, let alone a small one. It will probably stay out more than it wants to because of them. It will tend to stay out of their way?
 
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chancefavours

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Are you saying it's not cycled because there is no nitrates ? The tank is several years old and I never seem to read nitrates, and have had no problems.

looking at a new tank as the most common response over several sites and aquarium shops.
 

zakocsm

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Whoa, yea, don't keep a BGK in a 30 gallon. They really need a 100+ gallon tank, and 125 preffered. Definatley upgrade your tank as soon as you can or rehome it, that is why that fish is suffering because that tank is tiny.
 
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