i had mouth rot bad in my Mollie tank was losing fish a day for almost a week i put
this api fungus cure pro series in and in the first 48 hr the fungus was gone and on the 2nd treatment (the box say use to for full effect ) there was noticeable repair to the damage and now it cleared up btw it makes the water very green till u put the filter back in and it is crustation safe hope this helps