Cyano harmful if eaten? - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 3 Old 03-15-2012, 02:45 AM Thread Starter
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Cyano harmful if eaten?

I cleaned out one of my filters a bit today and some cyano bacteria that was growing in it fell into the tank. The fish swarmed all over it. Anything to worry about?
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post #2 of 3 Old 03-15-2012, 02:56 PM
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No. They must be starving; I've not heard of any fish eating cyanobacteria before.

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 09-03-2012, 12:54 PM
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In the world of SW, Koran angels are known to snack on cyano. I have noticed some of my other fish sampling it when I scrape it from aquarium glass, but they seem to do this out of reflex more than authentic hunger.

Some forms of cyano can be deadly dangerous, however, and here in Illinois this summer a number of dogs that had been allowed to play in a cyano infested pond suffered horrible consequences. Two died outright and two were hospitalized and largely paralyzed. Never heard the final outcome of this. Cyano can produce chemicals that are dangerous, so take care when working in tanks with cyano. No short-cuts like starting your siphon by mouth!

FWIW, I do not know if cyano or its by-products are lethal to fish, but it wouldn't surprise me. Fish die off in summer waterways for reasons such as high temperatures and low oxygen. It would not surprise me if cyano kills some as well.



thousands have lived without love; not one without water.


W.H. Auden in "First Things First"
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