I just noticed today that both my blood parrot and texas chcilid have what looks to be ich 2 weeks ago i added a green severum which looked to be very healthy so i dont know if he had it or is it just a fluke thing that happened i do 40% water changes weekley and all my readings are good . I have 5 fish in the tank so im guessing i need to treat the whole tank . Ive had ich before in another tank and used a chemical but it stained everthing in the tank so i would like to stay away from that . just spent alot of money on decor and drift wood in this tank . i have read that heat will kill it just by itself but am unsure if i should try it i dont want to loose any fish does anyone have any suggestions on this ?