Okay, so i recently posted that i put sll my fish in a new 30 gal tank and all my tropicals died and only my betta lived. Since the fish started dying hr has been laying in one spot in the tank and is what looks like dying. Okay do anyway i put him back in his old tank which was recommended by someone on here. Anyway my problrm is his eyes since the fish started to die he has had this what looks like white film or glassy look on his eye and when i see if he is alive by putting my net in the tank anf he swims and looks around i can see like his pupils under the whitr stuff. PLEASE HELP ME!!!!!!!!!

Never put a betta with other fish, not even with each other. I believe that the Berta might have killed your other fish:(
make sure you have cleaned the bettas tank and use a pH system for the water to be alright for him..i have had bettas that get the film over the eyes so that might not be anything. good luck!

fish owner for 15 years

dude below is right, dont put bettas with other fish. but what probably got most of them is poor water conditions and ick. Go bring a water sample to your pet store and buy some ick medicine