that probably wouldn't be a good idea.. the Oscar will probably eat it.
I dont get it. Did your angelfish die?
No...betta fish are usually aggressive and might kill the angelfish.
No oscar will eat it
No the beta will try to kill it
That will likely cause very few problems.
I have an Oscar Cichlid in the same tank as mine and I also used to have it with guppy's.
Angelfish are very aggressive fish. They are also very territorial. They want their own space and the whole tank if they can have it. I'd suggest that if you have a small 3 to 5 gallon tank you get a bigger tank as that size tank is too small for Angelfish.
To maintain or gain leadership in an area, probably your tank.
Anything that's bigger than them. My angelfish is afraid of the light over the tank.
Angelfish are clever fish, from my experiences if you put your finger up top of the tank they will follow it.
It is not harmful. But if you want to clean up the algae in the tank you want to get a pleco. They are very peaceful fish and will not harm angelfish. I have a pleco and three angelfish in my 35 gallon tank right now and they get along great!
The water in the tank that you are transferring the angelfish to should be the same temperature and PH of the old water.If you are adding them to your tank from a fish store, then you should acclimate the fish first by floating the bags in your tank, and every so often add a bit of your tank water to the water in the bag to avoid temperature or PH shock.