hi there ,im not sure if im in the right forum,ive just joined,but i need some help

. i have a biorb 60ltr its about n6 to 8 wks old now,and my water was as it should be blah blah.3 wks ago i added 2 dwarf gouramis and 1 of them[i call him spot,
HO ho] ended up with
ICH,white spot. ok no panic...i buy the biorb first aid kit and have been using it for the recommended time of 2 wks.so far no other fish show signs of spots and spot himself is very fit,he is swimming eating etc.i am now supposed to put the normal maintenance cartridge back in the tank but his spots still havent cleared and in fact he has more on him

??im thinking whether i should use another first aid filter for another 2 wks or buy some drops to treat it or use aquarium salt PLUS drops!im very confused pls help!!!!