Acriflavin treatment (Was Re: Mouth Rot) Home › Forums › Acriflavin treatment (Was Re: Mouth Rot) March 13, 2001 at 11:05 pm #14571 jthompson@shapirofirm.com I have Aquatronic’s “Acriflavin Plus(TM)”. For aquarium treatment, it says 1 teaspon per 5 gallons. Should I soak in a higher concentration? Is Nolvasan a better way to go?