Is this tank still being kept at 80F (27C)? The fish left with the highest minimum requirements is your BN, that being 70F (21C). If you have not already since your "emergency" section post a week ago, turn the heater thermostat down and let the water temperature naturally fall.
Are you bubbling carbon dioxide or using a product like Easycarbo to give light-loving plants extra food?
Hey its been dropped to 23C. I havent used any plant food they just get what they need from the light and tank and growing great.
I just checked My BN its actually covered in little raw marks so its either been fighting as its slightely bleeding or looks it. Or its caught it self on something
It doesn't look good. If it is just an injury, the best remedy is lots of clean fresh water. Massive water changes daily or every other day will allow the fish's natural immune system to allow it to heal without meds. Catfish can be very sensitive to meds. I'd post in the emergency forum, though, for confirmation of this advice.