Sounds like yours is a different product. This tunnel adheres to the side with suction cups and it has a lot of small holes along with a larger side hole and holes on either end. Maybe you have the floating log? I've had one of those for years and it's perfectly safe
Wanted to alert all betta owners that there's a dangerous product being marketed for bettas called the betta hideaway tunnel.
I purchased this on July 9th for my betta tank. This morning I found my fish dead in the tank. He had tried to swim through one of the smaller holes along the side, got...