I have a betta who is infected with columnaris. I first noticed symptoms on december 25th, 2019. ever since then, he’s been in a hospital tank undergoing treatment. today is january 12th, 2020 and he has still not improved. he has fungus coming out of his mouth, he can barely eat and is mostly inactive. his first treatment I put him through was kanaplex and furan-2 (I started the furan a bit late because I wanted to try the kanaplex on its own first). with this treatment he did not improve and I saw no changes. he is now on doxycycline, ciprofloxacin, and malachite green. i’m following all of the medicines instructions, he’s on day 7 of his treatment, and still see no improvement. he’s in a 2.5 gallon HOSPITAL tank, heated to 74 degrees F (it’s so low to slow the growth of the bacteria), and I do daily water changes because his medication advises to do so. all i’m really asking is, is it too soon for me to give up on him? I cannot continue this treatment much longer because the medication says I can’t. the last thing I want to do it put him down, but I really feel like it’s my only option. if anyone has any advice that you think could possibly save him, please let me know. if you guys think I should put him down I will do so. thank you in advance. this is really my last post about him and if nothing changes within a few days i’m probably going to put him down.