i don't think any of this methods work 100%. there are many people say that what they used worked great for ich and many that say that the same treatments didn't work at all. it's possible that many people confuse ich with something else. i was there with ich problem too, at one time, and used many named methods that didn't work for me either, not until named drug. also, it treats other simular parasites and i felt that it was the best way to go without guessing if i got the name of a parasite right. and as for scaleless fish, the med isn't just for that type of fish but for any, it's just often u can't use some meds with scaleless fish, but u can with this med and that's why the company noted scaleless first. now, i'm not saying that this med is effective at all times and everybody must use it, u always should stick to something that works for u, and the reason i can't say it is because i only used it once and thankfuly didn't have an outbreak of anything for some time. i also know only one person that tryed it and it's me, so that's why i can't say for sure. but one thing i wanted to note is when i used everything else before i had 3 ich outbreakes and lost every but one fish by using everything out there, until i got the med that i recomend.