Cryptocorynes are fine but Duckweed isn't the best plant for Bettas. Water Sprite is a better plant for Bettas.
I was never into aquascaping and certainly not into paludariums. Your best bet for ideas is to Google search for paludariums and look at the images. Then pick things you like and incorporate those into your design.
I was never into aquascaping and certainly not into paludariums. Your best bet for ideas is to Google search for paludariums and look at the images. Then pick things you like and incorporate those into your design.