Bathing effect of nifurpirinol on Ichthyophthiriasis in goldfish, pangasius, kissing gourami, blue gourami, clown loach, black molly and guppy was investigated. By short time bathing(510 minutes)nifurpirinol was effective at 12ppm. By the bathing for seven consecutive days the drug was also effective at concentrations of 0.050.2ppm. White spots in the treated fish disappeared on 7 days after treatment.
