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I have had these Rummy Nose Tetras for a few months now and recently they have developed green spots over their head. Two of them have more of a green line from the top of the head till their mid section.

Is this normal or have they caught some sort of disease? Also, upon further examination, it sort of seems as if my Neon Tetras have a little green to them as well. (Although I might be seeing things since the light reflects off weird.) I figure that if its normal for the Rummy then there is probably nothing wrong with the Neons.

I change 30% of the water bi-weekly (as in every two weeks) and have HOB Aquaclear 70. Water Sprite and Hornwort are the only plants. Water temperature is at a constant 75 degrees. 55 gallon tank.
 

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I've never seen any disease that presents itself as green spots. :shock: Based on that, I'm guessing that they may be developing some iridescence as they age. It's also possible these are breeding colors, depending on the type of rummynose you have (there are three possible variants, hemigrammus rhodostomus; hemigrammus bleheri; and petitella georgiae).

If the fish are acting normally, I would say it's some normal process.
 

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I've never seen any disease that presents itself as green spots. :shock: Based on that, I'm guessing that they may be developing some iridescence as they age. It's also possible these are breeding colors, depending on the type of rummynose you have (there are three possible variants, hemigrammus rhodostomus; hemigrammus bleheri; and petitella georgiae).

If the fish are acting normally, I would say it's some normal process.
Yes, they are still eating and acting normal. I'll continue to monitor them. Thanks for your suggestion. I just thought it was really odd that they developed green spots. I haven't seen any other at the store with those spots.
 
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