trying to figure out the problem

noelberg

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A couple questions:

1. Can high levels of nitrAtes cause red gills just like ammonia?

2. Is there any problem I should rule out if my fish with red gills don't flick against rocks/plants?

3. Will a med with malachite green/formalin as active ingredients do anything against velvet?
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stuff going on:

One pristella has extremely red gills, and one died 2 days ago. I nearly lost my female swordtail too, but she's looking better. A plant's root system rotted and made a mess, and I think I was overfeeding for about a week or two, so there could be bacterial/condition problems, but I did two water changes earlier in the week. I also checked the conditions and the only chemical that showed up was nitrAtes, and it was in the safe zone. I don't think there is velvet, but I can't tell with the pristellas. I wanted some new fish, but I didn't want to go about it this way!

PS, The tank has been running for a year, and no new fish have been added in the past few months. The temp in my apartment is around 65 F, so water going into the tank won't be 76. I doubt I'm having troubles with the water conditioner (Aquasafe).
 
According to the "Handbook Of Fish Diseases" .. healthy gills are bright red and ammonia tends to make gills loose color.

Good Day ...
 
High nitrites can cause red gills, old age, gill flukes, irratation, is the fish also heavy breathing.
 
No heavy breathing. The pristella that had to be euthanized was doing the "flip of death" in the water. Just did a 15% change yesterday and plan on doing another today. After the water change the cory stopped swimming to the surface for 'gulps' -still has reddish gills.

Have another tank with heavy breathing and red gills tho ...
 

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