Cardinal tetras, platy, upside down then dead - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
LinkBack Thread Tools
post #11 of 12 Old 11-21-2011, 08:58 AM Thread Starter
New Member
Jasey's Avatar
Originally Posted by Calmwaters View Post
When you did the water change before the fish started acting strange did you replace the filter media? If so maybe it caused a spike in the ammonia/nitrite/nitrates which affected the fish?
Thanks for your reply. I did not change the filter media on the previous water change before this happened. It has been a couple of months since I changed the media.

Fancying the fish world!
Jasey is offline  
Sponsored Links
post #12 of 12 Old 11-23-2011, 04:07 PM Thread Starter
New Member
Jasey's Avatar
Just wanted to provide an update. The paradise fish is still behaving regularly. The redness that was near his fins and body has been reduced dramatically, only a very pale pink left.

After all of this and doing some research, I believe what may have happened is I had high nitrate levels in the tank. When the temperature fluctuated over the course of a couple of days, this caused stress on my fish which made the cardinal tetras particularly susceptible to the nitrates. Then, when I did a 50% water change and added the water conditioner after adding the water to the tank, the tap water contained too much chlorine or other heavy metals or contaminants which affected the remaining fish. The paradise fish survived, I am pretty sure, because he was able to breathe the air, although chlorine or other toxic substance in the tap water still showed physical distress signs on his body.

Fancying the fish world!
Jasey is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help, what is this killing my Cardinal Tetras? GwenInNM Tropical Fish Diseases 1 07-10-2011 09:01 AM
cardinal tetras smoodgie6 Characins 5 05-28-2011 04:23 PM
Neon, Cardinal Tetras Mirta Characins 4 03-18-2008 10:35 AM
ich on cardinal tetras! superman Tropical Fish Diseases 1 10-25-2007 04:24 PM
Shy cardinal tetras help. arlong1 Characins 2 05-20-2007 05:08 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome