Geophagus is spinning out of control. Help!

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EDKexotics2003

Feeder Fish
MFK Member
Dec 7, 2022
18
19
8
21
Have you tested your water?
Yes
If yes, what is your ammonia?
0
If yes, what is your nitrite?
0
If yes, what is your nitrate?
25 ppm
If I did not test my water...
  1. ...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.
Do you do water changes?
Yes
What percentage of water do you change?
41-50%
How frequently do you change your water?
Every week
If I do not change my water...
  1. ...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.
Hi everyone,

I’m reaching out for help with a strange case involving one of my Geophagus sveni. For context, I recently moved across the state for college and brought my fish with me. My breeding colony of G. sveni was temporarily moved from their 180-gallon tank to a 75-gallon holding tank while I get the larger setup running again.

After 10 days in the holding tank, my largest and oldest G. sveni suddenly started spinning and flipping uncontrollably. From past experience, I was ready to lose him within hours, but here’s the twist: it’s now been 4 days, and he’s still alive, eating enthusiastically, and showing no loss of color, weight, or appetite.

Here are the tank parameters:
  • pH: 7.2
  • Ammonia: 0 ppm
  • Nitrite: 0 ppm
  • Nitrate: ~25 ppm
  • Temperature: 80°F
  • No new fish introductions or visible signs of disease in the rest of the colony.
  • Weekly WC.

Has anyone seen something like this? Any advice or treatment recommendations would be greatly appreciated!

Thank you
 
The average nitrate concentration in the Rio Tocantins where sveni are found is less than 1 ppm, with a pH of 6.5 to 7.2.
If the pH and hardness to where you have moved, are much higher (along with your 25 ppm nitrate ) these factors may account for the changes.
To me a much more strict water change schedual to reduce nitrate concentration might be in order.
 
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Move to a quarantine tank if you can. Lower the water level so the fish can lay on its side and just stop moving. Add some epsom salt 3tbsp per g and prazipro. Keep the water pristine and consistent.
 
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