Cardinal Tetras - Unexplained Deaths

Mark Webb

Member
Joined
27 Nov 2008
Messages
365
Recently stripped down a very well established Jewel 60 and took out the internal filter. I installed the filter (very well matured with original uncleaned filter) into a temporary 10 gallon tank.

Transferred inhabitants into the 10 gallon - 10 Cardinal Tetra, 3 Glowlight Tetra, 3 Amano Shrimp and about 30 Crystal Red Shrimp, along with some Moss and a couple of other plants. All been fine for 4-5 days. Just been away for the weekend (Saturday till Monday) and returned to find all the Cardinals dead. Shrimps are all fine and so are the Glowlights. Have not tested water yet but I would have thought if anything were wrong the Shrimp would be first to suffer.

Any ideas please?
 

Ed Seeley

Member
Joined
3 Jul 2007
Messages
3,261
Location
Nottingham
Cardinals are very sensitive to wastes or disturbances so it could be either of those. I agree though I would have expected the shrimp to succumb first too.
 

Steve Smith

Member
Joined
19 Jul 2007
Messages
4,422
Location
Leamington Spa, UK.
I'd be concerned that 10 gallon might be too small for housing that many fish for any length of time, without regular water changes.

Any amonia readings?
 

SunnyP

Member
Joined
19 Jul 2008
Messages
130
My first fish were cardinal tetras and black phantom tetras. I found that the cardinal tetras were prone to a motor neurone disease which meant them losing control of muscular motion, if I'm thinking about the right fish of course.
 

davidcmadrid

Member
Joined
21 Jun 2009
Messages
115
I love Tetras but as a beginner i hated them as they are such proxy for the state of their environment even stress factors , anything goes wrong and they croak it. I can tell if something is wrong in the tank just watching how they behave . e.g swim together or apart ,, hide etc. Good luck getting to the bottom of it. Incidentally they are a great read on the 02 levels in the tank too from watching how fast they " breathe ".
 
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