Lost 6 Fish Today

[weejen]

today i came home from work to find some fish missing. 2 swordtails 2 corys and 2 baby mollies. so i did a water change to lower water so i could look for them and found all of them dead. all looked ok this morning b4 i went to work and nothing noticable on the bodies. i have just tested my water bout 3 hours after water change. i didnt test any water b4 water change so have no results

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Tank size: 140l
pH: 7.6
ammonia: 0
nitrite: 0
nitrate: 10ppm
kH: no test
gH: no test
tank temp: 27c

Fish Symptoms (include full description including lesion, color, location, fish behavior): as above

Volume and Frequency of water changes: every sunday and today bout 30%

Chemical Additives or Media in your tank: a fluval 4+ and a fluval 2+

Tank inhabitants: mollies, corys, common plec, platies, and swordtails and mollie fry

Recent additions to your tank (living or decoration): last fish added last weekend was the platies and the swordtails

Exposure to chemicals: none

i feed once daily with flake and some frozen every once in a while

 

[WILDER]

Any symtoms to go on.
The new fish could of fetched something into the tank.

 

[weejen]

the swordtails were a bit dull but thats it

 

[WILDER]

Being pale can be a sign of stress and desease.
If any more fish die get back to the board.
Keep a look out for flicking and rubbing, darting, excess mucas. Or it could be bacterial.
With the corys dying it could be bacterial.

 

[weejen]

what should i do if its bacterial?

 

[WILDER]

Use myxazin by waterlife, or anti internal bacteria med by interpet.

 

[weejen]

well i lost most of my fish now but i did notice on one that it tail started to turn white and it progressed up its back and within a couple of hours it had died any ideas what it could be?

 

[WILDER]

The fish back did it look fluffy or just bleached out.
Did it also go down the sides of the fish to form a saddle shape.

 

[weejen]

looked just like the colour faded not fluffy or blistered. started at its tail and was half way along its back when it died a couple of hours after it started to happen

 

[WILDER]

Bless him. R.I.P.
It could be columnaris. Just carry on with the myxazin med.
Any signs of flicking and rubbing.

 

[weejen]

nope no signs of flickin or rubbing. they just seam to go down hill so quick

 

[WILDER]

It could be columnaris so keep a look out for fluffy patches, white mouths, bleaching bemeath the skin.
Greyish spots with a circling of red around the edges or red centre. Strands of cotton coming of the fish mouth, fins.

 

[weejen]

thank you i will do