Canada
Just providing a link, no advice, I didn't have any luck with Neons, the black neons (aside from coming with ich) are great, but regular neons are too edible for my tank.
Just a little note, TB is not that common, red streaks are bacterial (Hemorrhagic Septicemia, typically Gram-), typically associated with overcrowding, stress or polluted water.
Treat with, 50% water change, + carbon to remove the meds you already added for 1 day, remove carbon, treat with Maracyn2, full course (5 days, double dose on first day, 1 packet (now powder formula, used to be pill, can be either, check expiry date, if it's not on the box then it's on the foil and probably expired) for each 10 gallons, (so 29Gal tank would be 6 packets first day, 3 each day for remaining 4 days), observe at end of treatment for improvement (you should look every day, improvement should be noticeable after 2nd day, but don't expect 100% recovery by then.), if still signs at end of treatment, extend it a couple more days, if there is no improvement after 5 days, try maracyn (not 2).
You can also add melafix as it will help with the fish healing.
I'ld recommend an Ammonia badge to monitor if your biological filtration fails, which is always a possibility with anti-bacterial meds. Keep an ammonia remover (Prime de-toxifies ammonia, amquel does the same I believe) just incase.
Edit: I noticed you are using med. food only, so you can skip the carbon step.
2nd Edit: The fish may be suffering from bacterial infection alone, most likely internal, Maracyn2 doesn't require them to eat which is good.. Wasting can also be caused by bacteria, as can bloating as Hemorrhagic Septicemia progresses it will cause fluid to leak into the fishes body, (I know, sounds silly, it's soaking in water), but that is the way it progresses, you may also notice ulcers, red streaks, fin decay, sores at fins or wasting (fish not eating, or bacteria consuming what it does eat).
It may also be primarily Parasitic, tho most parasites give some external sign..