hole in head

Question
i have a 55 gallon tank.3 oscars & 1 jack..the oscars are 6-7inches long..1 has hole in head,3 weeks ago 1 died.Yesterday another died,the 1 with hole in the head is still living and the jack is still living.what i need to know what to do now and if the other 2 fish i have will die.plus,the fish with hole in the head is kinda real bad... I NEED HELP BADD

Answer
Jay,

Unfortunately I have no idea if the other fish will die but we will try to keep that from happening. I have included an awesome website about hole in the head disease in Oscars. HITH is curable and 100% preventable. It is very important that you have a water tester and test your water weekly. If your fish gets HITH disease it is because of poor water quality. Please read this website and follow their directions in treating and preventing this disease.

http://www.oscarfishlover.com/helpful-articles/hith-disease