About a year ago I adopted a fish tank from a friend of mine who was moving out of town. Here are the specifications:
- 29 gallon freshwater tank
- Way overpowered Emperor biowheel filter
- Gravel Substrate
- Flourescent light on a twelve hour cycle
- Water chemistry is stable at 0ppm ammonia, 0ppm nitrites and <20ppm nitrates
The tank is stocked with:
- Four pearl gouramis
- Two black-skirted tetras
- Four neon tetras.
At the beginning of my ownership I managed to kill a fair amount of guppies, but I believe that was due to my inexperience and overfeeding.
My problem at the moment (or annoyance, more like) is that all of the tetras suffer from seemingly aggressive fin rot. Here are some photos:
They all seemed to have this amount of damage when I received them, and their condition has not worsened since I've had them in my care. The gouramis in the tank don't show any signs of fin rot or other disease whatsoever. About two weeks ago, one of the black tetras developed a tail-fin infection (white nodules and decaying tissue) which ate away at its tail and then died down. About six months ago I tried a course of antibiotics (tetracycline) but it didn't seem to do anything.
So my question is, what, if anything, can I do about the tattered fins on these fish? They don't seem to be suffering really, and certainly aren't terminal, but I feel like a fairly crappy fishkeeper because they don't seem to be able to get back to a state of optimum health. Is this simply a matter of poor genetics or something like that?
Any thoughts would be appreciated.