Would you mind telling me how they got through so I can betta proof it so it won't happen to me?In my experience it doesn't work that well. And I spent wayyy too long putting it in. I've had a few fish wiggle through the sides, and it wasn't pretty. I have it in 10 2.5's and in 3 of the tanks a fish has figured out how to get through. So in my experiences it has a 70% success rate. But I guess if you're only doing it in one or two tanks it's more likely to work.![]()