Question for the experienced betta owners. I just set up a 16 gallon with a mixture of silk and live plants.....which over time will become completely planted.

I noticed the betta is hanging around the surface a lot. My experience is with goldfish tells me that a fish at the surface is lacking oxygen at the lower levels. I added more surface agitation but I'm worried its too much for the betta. What's the proper way to handle this?

Thanks so much