Can I Add Neon Tetras?

Hey guys, so I'm wondering if it'd be possible to add neon tetras to my current tank. Here's the stock

6 Black Skirt Tetras
4 Sunburst Platies
1 Dalmation Molly
1 Angelfish (he's a very little guy, same size as the BSTs right now)

I think I read that they aren't big waste producers, and how many should I add if I could add them?

Thanks guys!

 

The anglefish may be little now...but when he gets bigger, the neons will be his dinner.