Figured him out LOL!

[BettaPirate]

So I was wondering why after I moved around Jack's tank he was spending a lot of time trying to burrow under his cave, then I realized that the undergravel heater I have in his tank was right there, he goes down there to sleep because it's the warmest spot in the tank! Can't believe it took me a week to figure it out! He is just like me, I cuddle up in my heating blanket at night :)

[blu the betta]

thats exactly what my betta used to do! he would always be next to my heater.

[BettaPirate]

he never did it until I moved his cave about an inch closer to the heater lol

[RoMay]

My betta likes to sleep ontop the heater to. It's a thicker side one just wide enough for her to rest on-for now.