Okay update time! Yesterday spoke to three different vets, one saying the fish needed to come in to be prescribed medication legally, another wouldn’t prescribe based off little fish medication knowledge and the last one was kind enough to prescribe metronidazole, it was dosed 1ml per 1 litre and only had 10ml on hand..... so the naso is currently in 10 litres... which is tiny! Treatment is 3 days then 100% water change. Below are some photos, she took her first meal in over a week this morning and I’ve had success with methylene blue baths in reducing the inflammation and sores. Will update her progress but she looks to be improving!! Finally a win for me against disease