Red Gills On Neon Tetras And Corys?

Discussion in 'Freshwater Fish Disease' started by EffaMoulton, Apr 6, 2019.

  1. EffaMoultonValued MemberMember

    Neon tetras have a little bit of red on their gills (which I just noticed a day or two ago) the Cory’s don’t look too bad but it looks a little pink. The neons started being aggressive towards each other for some reason and eating off the bottom... which I haven’t seen them do. I did a water change 3 days ago, tested the water and everything was normal did a water change yesterday (20%) and then tested the water today. Ph: 7.5 (hard to tell on test strips) Kh: 300 Gh: 25 Nitrite: 0 Nitrate: 20 Ammonia: .25

    Tank temp is at 78.
  2. DonthemonValued MemberMember

    Do a 50% and dose with prime. How long has the tank been set up?

  3. EffaMoultonValued MemberMember

    Tank has been set up since February 19th

  4. ExecutionernernerNew MemberMember

  5. EffaMoultonValued MemberMember

    I’m not sure when my ammonia would have gotten high enough to cause harm, but I guess it did. What can I do to help them heal?
  6. EpicozWell Known MemberMember

    maybe try some melafix but make sure your ammonia is down before you remove the filter
  7. mattgirlFishlore VIPMember

    Don't remove the filter!!! If it is a cartridge cut a slit in it and dump out the carbon and put the cartridge back in there.

    Red gills do often indicate ammonia burn. How often and how much water were you changing before you noticed a problem with their gills?
  8. FrankieflowazValued MemberMember

  9. EffaMoultonValued MemberMember

    I have been changing water 1-2 times a week, doing about 20% and the ammonia never got above .25 that I’ve seen and I test weekly.

    I used a tetra quick start when I first set up the tank, and use a water conditioner every water change.
    Last edited by a moderator: Apr 8, 2019
  10. mattgirlFishlore VIPMember

    That should have prevented ammonia burns. I think I would be doing larger water changes though. As long as your use your water conditioner and temp match the water you are replacing 50 or even 60% water changes are not a problem. I think a 50% a week would do more good than a 20% twice a week. Are you vacuuming your substrate while doing your water changes?

    BTW: My neons occasionally go to the bottom to grab a tasty tidbit so I don't think you seeing yours do that being a problem. How many neons and corys do you have in there?
  11. EffaMoultonValued MemberMember

    I have 11 neons and 2 Cory’s, I’m in the process of getting one or two more. I do vacuum substrate lightly, since I have plants.
  12. mattgirlFishlore VIPMember

    Since corys spend all their time foraging for food in the substrate it needs to be kept a bit cleaner
    than a tank without them so it is good that you vacuum it :)
  13. RehananValued MemberMember

    I ran into a similar issue with my neon tetras! Very strange, they seemed to have gotten ammonia burns within the hour. I am so strict with my water changes - but am almost certain it wasn't an ammonia spike.
  14. EffaMoultonValued MemberMember

    Mine are still acting completely normal, are yours doing the same?
  15. RehananValued MemberMember

    In general, i'd say yeah they're acting normal for sure but to be fair, I think I am also getting a little paranoid about them now so I feel like they are acting weird, even when they're not. Only thing standing out to me is they're not sticking as a group as much now. Don't know if that means anything.
  16. BettaBabe00New MemberMember

    If you don't already have an air pump get one. Aeration will help while their gills are inflamed. Even with fish that don't normally need an air pump do better with one especially if ammonia or nitrite poisoning is involved.
  17. mattgirlFishlore VIPMember

    I don't think that is anything to be concerned about. Right now I have 5 of them. They are at least 2 years old. Occasionally I will see them scattered all over my tank and at other times all grouped together. Occasionally they seem to get in a squabble with each other but I just assume it is mating behavior because before long they are all best of friends again.

    It pays to be vigilant but most of the time what we are seeing is just normal fish behavior. To be perfectly honest I have lost more neon tetras than any other fish over the years. I would love to have a huge school of them but it seems any time I add more I lose some of them and some of my original group so have decided not to add any more as long as I have these 5 healthy ones. I have never seen any kind of outward signs on them. They just die for whatever reason.
  18. EffaMoultonValued MemberMember

    I’m running one, it’s just not going very fast. But you can see that there’s pleny of air in the water
  19. Peter MValued MemberMember

    When they're spread out like that it means they are comfortable. When they school in a tight group, they are doing it to feel more secure because they feel nervous about something. Mine only school tightly when i approach the tank or make a sudden movement.
  20. ystroutWell Known MemberMember

    Don't be confused by ammonia sickness and the normal coloration of their gills. Fish naturally have red gills. Some fish you can easily see that red, some fish you can't.

    If you're seeing red inside their gill plate, that's just their gills' natural red color. If you're seeing a slight red tint through their gill plate, you may just be seeing their gills through their gill plate which is normally slightly transparent.

    If their gills are clearly red, inflamed, and look generally unhealthy, that's when you have a problem. Either way, dose your tank with Prime evey 24 hours until your bacteria catches up and you have 0 ppm ammonia.

    Look at the pic below, it shows that you can see red on healthy neon tetras. Also google "pearl danios", their gills always appear reddish purple due to their relatively transparent gill plates and white coloration.

    Last edited: Apr 9, 2019