1~What type of fish is afflicted? Neon Tetra - gill damage red around the bottom part of the gill.
2~What are your tank parameters (ammonia, nitrites, nitrates, temp, pH)?
ammonia - .15
Nitrate - 10 ppm
Nitrite - 0 ppm
(none detected from the test)
Hardness - 75
alkalinity - ~40
temp - stable at 80 degrees
3~ How large is the tank? How long has the tank been set up? 55 gallons, about a week and a half. the fish in question was transfered to the 55 gallon tank from a 10 gallon tank after test reads on the 55 gallon tank showed the tank was stable for 3 days in a row.
4~What type of filtration are you using? A top fin filter that the tank came with - it has a tube that draws water into it and two cartrigdes that filter the water out. I also use a gravel cleaner when I do the 20% water changes.
5~How many fish are in the tank? What kinds of fish are they and what are their current sizes? 1 pregnant black molly, a male and female swordtail, 4 small clown loaches, 4 neon tetra
6~When is the last time you did a water change and vacuum the gravel? How often do you do this? How much water do you remove at a time? Once, I intend to do this every week and I remove 20-25% water at a time depending on the nitrate levels. I do 10% changes if there's something real wonky going on with a test, but so far I haven't had to do that.
7~How long have you had the fish? If the fish is new, how did you acclimate it/them? I've had the fish for about a month. I put him in my already established 10 gallon tank with the other tetra. When moving him to the 55 gallon tank, I did so responsibly as far as water tests go. The tank has remained stable, too.
8~Have you added anything new to the tank--decor, new dechlorinator, new substrate, etc.? He has changed environments, but his condition was there before changing him to the 55 gallon tank. The 55 gallon tank does have bubble rocks where the 10 gallon didn't have any at all.
9~What kind of food have you been feeding your fish, have you changed their diet recently? tetra min tropical flakes.
bonus question: why do the tetra move their mouths when they swim and also is this normal tetra behavior or an alert that there's something more wrong with my tetra that also needs to be looked at? They do not have neon tetra disease.
PS reason I didn't fill this out at first was because I just wanted to know what to do with a damaged gill (that was caused before purchasing him) and also if the opening and closing of the mouths repeatedly was normal tetra behavior or not.