Tiger Barbs turning redish

[Lotocus]

I have an established 75 gallon community tank - Earlier this week we introduced some new Otos, so I have been keeping a close eye on the tank, but today I noticed two of my tiger barbs (one green and one normal) have turned a bright redish orange on their face, and the trailing edges of their dorsal and tail fins. Does this just mean they are mature or is there something else going on? We've had the normal TB for well over a year, and the green for probably 8 or 10 months, all are pretty big - I'd say about the size of a 1/2 dollar. Has anyone else seen this kind of change? Thanks in advance.

 

[ImACoolguy]

What are your water parameters?


Caleb

 

[Lotocus]

Pretty normal. 0 ammonia, 0 nitrites, <40 nitrates. Exactly what I would expect the day before a scheduled water change.


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[ImACoolguy]

Probably just maturity then. I was thinking ammonia burns but you got things in check ??


Caleb

 

[Lotocus]

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[Lotocus]

There's a picture.


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[ImACoolguy]

Yup looks fine honestly.


Caleb