One of mah orandas has finrot and died...i immediately removed it fromt he water so it wont affect the other fishes..but recently...mah other oranda has finrot too.....what should I do ??...thanks guys

You could try some antibiotics like Myacyn or some salt. Check your pH, Ammonia, Nirite and Nitrate levels and do regular water changes. If you have other unaffected fish, if possible, you could move the infected one into a separate tank to stop it spreading?

Good luck