is it okay when bubbles form at the suface of my fish tank after i put medication?

[Kikiyo]

I found out that my fish has some kind of bacterial infection. its a fancy goldfish. theres white cottony things on him and fin rot and little spots of red sores. i bought MELAFIX ANTI BACTERIAL FISH REMEDY that cures open red sores, fin and tail rot, eye cloud,popeye,bodyslime, mouth fnugus and open body wounds. i put the amount of dose as said on the bottle into the tank and then a lot of bubbles clouded the surface of the water you cant even see through them. is that normal? ive never used med b4 so i dont know. please tell me if its okay, thanks

 

[KongX]

yes, it is the medicine that is causing the bubbles, just make sure you have a filter or air pump running to give oxygen to the water and break up the surface. clean the tank according to the medicine label.