Coursair
Aquarium Advice Addict
The filter will be adding air. As long as there is space between the top and the water there is air.
You could try a Moss ball or a Java Fern. I grew those with ambient room light.
Nitrates at 20 are fine. Cycled tanks have Nitrates.
What is the Ammonia reading ?
And yes, Bettas jump. But mine are kept in quiet bedrooms. No kids or things to startle them. So I have kept Bettas in open topped tanks. It's a risk, but mine have been fine.
My 10g Rimless tank with my Yellow boy.
Old pic
You could try a Moss ball or a Java Fern. I grew those with ambient room light.
Nitrates at 20 are fine. Cycled tanks have Nitrates.
What is the Ammonia reading ?
And yes, Bettas jump. But mine are kept in quiet bedrooms. No kids or things to startle them. So I have kept Bettas in open topped tanks. It's a risk, but mine have been fine.
My 10g Rimless tank with my Yellow boy.
Old pic