sure
it's based on this
humblefish did a video on it
it's really pretty easy, i bought a 1 gallon jar at some home goods type store, so it's 20 mL of 3% h2o2 per 1g. you definitely want to be pretty exact as that's treating at 150 ppm, more gets dangerous for some fish. i killed a wrasse way back when i doubled the dosage on accident. wrasses don't like the baths, but wrasses don't like anything qt ime
https://humble.fish/community/index.php?threads/fish-peroxide-compatibility-list.1789/
pretty comprehensive list at this point of fish tolerating the baths
i've had issues getting wrasses through httm, fairies in particular seem to love to just be casually dead somehow. i'm guessing they crash into something and break their spines which could happen in any qt tank, but i might change things up with them going forward
i can say for sure that just 1 bath doesn't do a ton by itself. i've done one bath and then tried to observe and like 3 weeks later i've had velvet pop up twice. so i'm guessing it knocks a lot of velvet off initially, but without followup it then builds back up. but in a pinch it's definitely the best bath to give a fish imo