hi all i hope someone here can help me. i have a longhorn cow fish which we thought had white spot after introducing a new fish to our tank, fresh water dips for 3 days removed all the white spots but then they began re-appearing again. my lfs gave me 10ml of some green liquid didnt catch the name to treat my tank 240l. so i removed my inverts and poured it all in now today 24hrs later my cow fish looks like death with a kind of scum/white slime covering his body (looks kinda like if you get really sunburnt and skin is all peeling) and his eyes are really swollen and cloudy, he is now just sitting on the bottom of the tank looking sad for him self. also another fish a striped cardinal is now swelling in his eyes and fins look a bit shreaded?