i found 2 Neon Tetras dead today so i think some thing is wrong like some kind of disease, i was thinking of trying some melafix medicine i have herd its good but i dont like useing it unless i have too cuz i have found a few fish dead after i use it last time ..........would that melafix medicine be the right stuff to use now? can u surgest some thing better (if this is some kind of sickness thats attacking the fish its realy the first time its happened to me so im not to shore what i should be doing .......now i think back the neon Tetras i got a week and half ago maby they were carrying some thing