I wrote ealier re: ich and fin rot on betta in 1.5 gallon tank. Finished up with the tetracycline and QuickCure(for ich). Feel diseases were gotten due to temp fluctuations from 75(day), to 70(night). During treatment, I added a pump without the carbon filter. On Saturday, changed 25% of water and added carbon filter per med recommendations. Fins started growing back. Thursday afternoon, looked and noticed a BIG chunk of his middle fin was gone and had strings of tail left in big chunk taken out. NO other animals in tank. I thought maybe had gotten caught under filter(had been fine during last 7 days), but anyway, took the pump out. Checked the water, and found ammonia and nitrITE were elevated(either .25 or .5 each(would these levels cause 1 section of his fin to disintigrate??). Prior to meds, fish in tank x 8 weeks and filter established enough that after new water added, ammonia and nitrITE were always at 0, and NitrATE was at 5(never got any higher). I switched out the water entirely, suctioned the bottom(left the plant and rocks in), and gave 100% new water yesterday(Thursday). Checked levels today, ammonia at .25(may not be accurate...have PRIME conditioner and liquid test I have can't separate the protected ammonia for true ammonia reading), and nitrITE reading is also .25. Could the medicine have done something to the bio filter or affected the plant in some way? The green plant did survive, but those leaves under the water(aponegetun plant), look like fall colored leaves vs. green), they have now perked back up, and have new shoots, so, the plant doesn't appear to be dying.
I have to go to work, so, won't change the water now, but, I don't understand why the nitrITES are now present when before meds, the nitrATES seems to have been keeping ammonia and nitrITES at 0. My 5 gallon with a filter and heater was started yesterday afternoon, so, will put him in it this afternoon to see how he does.
Thanks so much! Also, should I add any type of med to assist with fin re-growth? Or better to go au naturale! Thanks!