Hi
This is similar to something we posted the other day, but there's been some update. Wilder gave a suggestion or two, but I'd like some more thoughts as they didn't seem to quite match up.
We've got a 28L tank with 5 black neon tetras and 2 guppies stocked in it. The fish tank was set up about two and a half months ago. The tank was left running without fish for three weeks just a few plants and filter/heater/light during which time we were regularly adding Nutrafin Cycle. We had the water checked by the lfs who said the water was fine and we then added 4 Black Neon Tetras.
Initially we had problems with Nitrite levels (not that toxic but not 0, around 0.2) and narrowed this down to high nitrites in our tap water and have since resolved this with a water filter a couple of weeks ago, and have done a few water changes since then. We then added a couple more tetras bring the total to six. Tank stats are now:
Amonia 0
Nitrite < 0.1 (practically zero, you can only just discern any colour in the test)
Nitrate 5
PH 7.8
A couple of weeks ago we noticed that a couple of the tetras had small splits in their fins (nothing major) and one had the top fifth of his tail fin go missing (this has since mostly grown back). There have been no signs of fin rot and we put this down to the largest tetra nipping. These fin issues may be irrelevant but since we noticed them the same two tetras have had small black patches develop on their bodies some pin-head in size some about 1-2mm in diameter.
Yesterday one of these tetras was rapidly opening and closing rapidly its mouth (his gills were not going too quickly) and laying in one of the plants we have vertically, almost upside down and appeared to be in distress. We decided (agonisingly) that it would be best to euthanise the tetra as it was clearly in pain.
We're now worried about the other tetra with these patches, it has two on each side of its body. The fish seems fine (mind you so did the other for a while) and is eating and swimming normally. None of the other tetras have these black patches but we are worried it may be contagious.
We've researched fairly heavily on the internet but can not isolate what the problem is. Can anyone help?
This is similar to something we posted the other day, but there's been some update. Wilder gave a suggestion or two, but I'd like some more thoughts as they didn't seem to quite match up.
We've got a 28L tank with 5 black neon tetras and 2 guppies stocked in it. The fish tank was set up about two and a half months ago. The tank was left running without fish for three weeks just a few plants and filter/heater/light during which time we were regularly adding Nutrafin Cycle. We had the water checked by the lfs who said the water was fine and we then added 4 Black Neon Tetras.
Initially we had problems with Nitrite levels (not that toxic but not 0, around 0.2) and narrowed this down to high nitrites in our tap water and have since resolved this with a water filter a couple of weeks ago, and have done a few water changes since then. We then added a couple more tetras bring the total to six. Tank stats are now:
Amonia 0
Nitrite < 0.1 (practically zero, you can only just discern any colour in the test)
Nitrate 5
PH 7.8
A couple of weeks ago we noticed that a couple of the tetras had small splits in their fins (nothing major) and one had the top fifth of his tail fin go missing (this has since mostly grown back). There have been no signs of fin rot and we put this down to the largest tetra nipping. These fin issues may be irrelevant but since we noticed them the same two tetras have had small black patches develop on their bodies some pin-head in size some about 1-2mm in diameter.
Yesterday one of these tetras was rapidly opening and closing rapidly its mouth (his gills were not going too quickly) and laying in one of the plants we have vertically, almost upside down and appeared to be in distress. We decided (agonisingly) that it would be best to euthanise the tetra as it was clearly in pain.
We're now worried about the other tetra with these patches, it has two on each side of its body. The fish seems fine (mind you so did the other for a while) and is eating and swimming normally. None of the other tetras have these black patches but we are worried it may be contagious.
We've researched fairly heavily on the internet but can not isolate what the problem is. Can anyone help?
/freshaquarium.about.com/od/termsand...g/blackspot.htm
