I read a bunch online and decided that at least 2/5 of my fish now have tail/fin rot and not
ICH. On monday I added the recommended amt of aquarium salt and started a course of Maracyn II after doing a 25%
water change and gravel cleaning. Yesterday (day 2 of maracyn) I checked my water and had 0-
ammonia, 0.3-
nitrite, and 0-5
nitrate. I was worried that the nitrite was rising so I bought and added
API Stress Zyme hoping the beneficial bacteria would help. I just checked water today (day 3) and have 0.25-1.25 (the color doesn't match either exactly)-ammonia, 0.3-nitrite, and 0-5 nitrate, also checked
pH and found to be 9.0 (the only baseline pH I have 8 about 2 wks ago).
I realize that I made a mistake by treating my whole tank instead of having a hospital tank. My thought was that at least 2-3 of the 5 had obvious signs so I wanted them all treated not realizing at the time that the purpose of the hospital tank is so the antibiotic doesn't kill my bio. filter. Also, I don't have a second filter, heater, etc for the back up tank.
Here is my question.
I know that ammonia and nitrite is rising and I should do another water change but the instructions for the Maracyn II say not to do a water change until after day 5 (it also says that it should harm the established bacteria in my tank). Do I do the water change anyway or wait it out until after the Maracyn? Also, I'm beginning to wonder now if my tank had ever completely finished cycling. Luckily the fish seem to all be doing well. The signs of tail rot don't appear to be worsening and everyone is active and eating. How long does it take for their tails to heal?
Thanks again for advise.