Does the hang on back filter provide enough Oxygen?

Hi. I have a 20 gallon high planted tank with a cascade hang on the back filter. Is that enough air for my fish?

 

You don't give many details but it seems like it can if your worried then get a air pump

 

Hi. I have a 20 gallon high planted tank with a cascade hang on the back filter. Is that enough air for my fish?

you can go bubbler or power head to increase surface agitation which increases oxygen exchange

 

You don't give many details but it seems like it can if your worried then get a air pump

I have 1 gb ram, 8 cardinal, and 6 kuhli. I'm nota worried I guess, it's just that I don't really know what gives oxygen to the fish and don't know if it's enough. I bought them a week ago

 

They should be fine if you want to be safe then get a pump

 

More than likely. As long as you don't have a tight lid on it and its not COVERED with surface plants, a HOB is more than enough. Its the surface agitation that aids in the gas exchange and the tank being oxygenated.