Do fish have unlimited energy? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 05-20-2011, 09:35 AM Thread Starter
Grimmjow's Avatar
Do fish have unlimited energy?

One of my black kuhli loaches has been swimming in a circle against the glass for hours, literally hours. And its like every day, and usually one of the others is there too doing the same thing.

They used to spend nearly all the time under rocks or wood now they are out almost constantly, the black ones swim around the glass and the regular ones are usually in the cloud of overgrown plants or on the sponge filter.
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post #2 of 3 Old 05-20-2011, 10:48 AM
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Often a sudden change in behaviour is a signal of stress from something. I have no direct experience with kuhli loaches, but my other loaches definitely do this when they are stressed. I recently moved my Botia kubotai to a new tank, and for more than a week all five of them swam in a clockwise circle against the glass in the rear corner of the tank all day long, only settling down on the substrate at night. Finally they stopped, and since have been normal. They clearly did not like the move. My dwarf chain loaches and dwarf banded loaches in another aquarium did much the same when they were moved.

The issue now is finding the cause of the stress. Stress can occur from many sources: water conditions, a significant change in water parameters (hardness, pH, temperature, nitrates), other fish in the aquarium, too few loaches in the group (should be at least 5 kuhli), chemicals/treatments/toxins in the water, etc. Consider each of these to see if you can track it down. As i said, i have no direct experience with this species, so it may also be that it is "natural," though I would doubt it, but if someone with experience says it is, fine.


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 #3 of 3 Old 05-20-2011, 11:35 AM
yeah not natural.... I have normal kuhlis. I would do a water change

38 gallon :
Pelvicachromis Taeniatus Nigerian Red not yet breeding pair
4 Pangio Kuhli
12 Hemmigrammus Bleheri
2 Botia Lohachata
1 Botia Straita
1 Ancistrus Sp.
6 Poecilia Reticulata

The Wet Spot Portland Oregon!!!!!!

ADA: Do!aqua Iwagumi 10 gallon size!
7 Clown Killies
7 Ghost shrimp
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