Ok, my betta 'Fishwish' (don't ask, lol!) loves to burrow. He started this behavior in his new 4 gallon Biorb and for anyone who knows Biorb media, well, it's pretty sharp.
When I got Fishwish, he developed some fin rot which I successfully treated. Perhaps it wasn't all heeled up PERFECTLY yet because when he burrowed, well you can guess what happened! There went his beautiful tail and fins!
I have since covered all the rough media with smooth rocks and things were better for him, but I found his tail was not heeling, so I put him in his original tank (a 1/2 gallon) which he actually used to really love in the beginning.
WELL! Not only is the medication working, but he is also blowing these insane bubble nests! As much as I think he really loves the Biorb, I couldn't understand why he never attempted a bubble nest in it. In the past all his nests happened in this 1/2 gallon one!
Does this mean he likes the smaller tank better?