About a month ago, my bonsai flowerhorn had a swelling on her tummy and went upside down. I started her treatment with Terramycin, while keeping her on fast. After few days, she went sideways and was not very well. I followed the same treatment for 10 days without filter and daily water change. Thank god that her swelling was gone, but now she has been sideways for last 1-2 weeks. Since last 2 weeks, I am feeding her blanched green peas. While her poop is not white, I see some fine threads in the poop occasionally.
Fearing internal parasite, I gave her a 3 days treatment of Flagyl, but nothing changed. I have recently started feeding her Hikari Excel again.
I am not sure if the picture got attached, so I am pasting a link where I've posted her picture. Does my flowerhorn have Ich/Ick?
My tank is 15G (yes I know it is small. I have purchased a 50G tank, but I am waiting for her to get well), no gravel, internal filter, an airstone, and eheim heater with temperature set to 30degrees. I don't have water parameters available with me, but I am doing daily water change and the water is crystal clean.
I will really, really appreciate if you can suggest me how to get her well.