Nope it's a bubblenest. He's been expanding it and I've noticed PKs make bigger bubbles. The big bubble in the middle is an air bubble but is where you'd insert a straw into the lid, he gets his air there. Lemme get another pic because there's smaller bubbles now.
Who am I? Well I am a Junior Member of the International Betta Congress and a breeder of white HMPKs, red dragon HMPKs, black/red dragon HMPKs, metallic multi HMPKs, blue masked HMPKs, and now multi color HMs. Soon to add black HMs. I will be showing in New Breeder class in fall of 2012.
Last edited by MrVampire181; 10-02-2010 at 01:50 PM.