I had 2 neon tetras and 1 cory cat die so far. - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 9 Old 12-20-2011, 10:17 AM Thread Starter
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I had 2 neon tetras and 1 cory cat die so far.

Yester day i did a 25% water change like i do every sunday. Today I woked up to a dead neon tetra. Since this morn i had 1 of my cory die and another tetra. THe Ph is 7.3 and water temp is around 79 degree. Everything seems to be the same as when i first set the tank uo last year. The tank holds 2 anglefish and 2 other cory cats and 2 more red eye tetra. What could be going on
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post #2 of 9 Old 12-20-2011, 11:39 AM
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were there any vilible wounds/ abnormalities on the dead fish?

,Stephen
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post #3 of 9 Old 12-20-2011, 11:41 AM Thread Starter
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The first Tetra to die stomach looked like it was eaten by another fish.
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post #4 of 9 Old 12-20-2011, 11:47 AM
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what about the cory cat?

,Stephen
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post #5 of 9 Old 12-20-2011, 11:53 AM Thread Starter
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No the cory had no marks on him at all.
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post #6 of 9 Old 12-20-2011, 11:57 AM
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strange. My albino corys have fought in the past leaving nasty sores. have your fish been known to fight with eachother?

,Stephen
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post #7 of 9 Old 12-20-2011, 11:58 AM Thread Starter
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Not to my attention. They seem like they all do very well together.
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post #8 of 9 Old 12-20-2011, 12:00 PM
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how old were they?

,Stephen
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post #9 of 9 Old 12-21-2011, 05:33 PM
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We need a bit more info on this. First to confirm: the tank has been running for a year, with 25% water changes every week. When this occurred, the tank held 2 angelfish, 2 red eye tetra, 1 neon tetra and 2 albino corys.

What size is the tank?
Did you use a dechlorinator (water conditioner) with the water change?
Aside from the conditioner (if used), is any other substance being added to the tank water?
Did you notice any unusual behaviour after the water change?
Is the tap water pH at 7.3 like the tank, or close?

Byron.

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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