Gar color change

[Chondromsb]

Hi there. I have a strange issue with 2 Alligator gars. I have had these fish for about a year and a half now. They have grown and been well up to this time. They are in a 2.5m diametre X 1.5m deep indoor pond. Tankmates are 2 small Pacus only. They are currently between 70 and 75cm long. We are at the end of a very cold winter. As soon as temperatures are better they are moving to their outside pool. I noticed 4 days ago that they have developed weird white patches on their bodies. No signs of this on pacus. Scales are not damaged and they are eating well and acting as usual. Water parametres are the same as always. I will try to attach pics. Any idwas and help are welcome. Many thanks. Shabeer. South Africa.

 

[xander]

check water parameters. any plecos in the pond by any chance?

 

[Chondromsb]

Hi there. Thank you. Water parameters are the same. We monitor ammonia, nitrates, nitrites and ph. Only the pacus in with them. Pacus have been in for 6 months now. Lesions look as if colour has gone, like bleach has fallen on them. Scales appear perfect.

 

[Oddball]

Until a determination is made on the cause I would treat, at least, with some salt to help the fish deal with the pathogen. Is it possible to swab the area for a culture or to gain a sample for a look under a microscope? A local vet or university should be able to check for whether the event is bacterial or fungal to provide a starting point to combat the pathogen.

 

[HungDang]

any update on this?