I need help with my female veil tail who has developed SBD. I apologize in advance as this is a long post I have treated her for the spectrum and nothing has cured her 100%. I got her in April from Petco and I had her in a 1 gallon tank. She was fine and ate 1 dry Hikari pellet a day and fasted on Sundays. I upgraded her in May to a 2.5 gallon tank. She was fine the first 2-3 weeks and then started having issues with her tail floating up to surface. I would fast her and she'd go back to normal. I started soaking the pellets which seemed to help, but now for the last 6-7 weeks she has chronic SBD. Fasting and pea treatment would initially help but she would go back to popping up and laying on her side after a few days. I tried feeding her only 3x a week no change. I bought frozen daphnia and bloodworms and stopped pellets, again helped but no cure. What is even more interesting is she will float or pop up and then an hour later swim normally at all levels of the tank and then sometimes an hour later sometimes 2-3 days later (I will fast her) and she goes back to floating or popping up. I decided to try meds. 1 week of Pima fix water change - no change 1 week of Api general cure - water change no change 1 week of Api Tetracycline - water change no change Medicated food with Seachem Metroplex, garlic guard, and Focus - no change 1 week of Prazi in tank - seemed better did 100% water change on 7/1/17 was better for a week and now back to floating. Was better yesterday swimming normally for a few hours now floating since 10 pm last night. She is an aggressive eater so no trouble dosing meds in food. I don't think it's a birth defect since she goes back to normal. She has never been handled rough or netted. I scoop her out in her original Betta cup. The meds should have ruled out parasites and bacterial infection correct? Someone said api aquarium salt. Could see be egg bound? I am out if ideas. She is otherwise healthy eating and social. I feel really bad for her because i can tell she's stressed. About her tank: 2.5 gallon Heated 74-76 degrees Aqueon filter Religious 25% water change every 7-8 days Conditioner - Seachem Prime 2 drops per gallon Api master test kit Water parameters today: pH - 7.4 Ammonia is usually 0 but I think residue from meds bumped it up to .25 ppm. I added 5 drops of Prime to neutralize until i can do water change tonight. Nitrites - 0 ppm Nitrates - 0 ppm Can anyone help me? Please don't yell at me about meds. I know it's bad. I had an experienced fish store owners guidance and they were spread out over the entire course of this, not all at once. Nothing has helped my little fish. I have a ton of money invested in my $2.99 girl. Any advice would be appreciated. Below are some pics. Thank you all so much!