This is what my Betta did. I know its a bit late but the my girlfriend only just told me about the competition. Eitherway i thought it was pretty impressive. He just used all of his tank space up. He was asking me for a bigger tank so he could blow a bigger nest for me! The holes i had to make myself so i could feed him instead of the worms just floating on bubbles!! Who needs a cup hey!
Hope you like it!!
Matt