In my case, you could come out and take a look. But, you cannot see the gurgle buster due to the overflow being in the back center of the tank. That's the one thing I would change about my tank if I had it to do over again. If I did, I would have put the overflow in the corner of the tank. That way I could see what is going on in my overflow if a fish jumped in there or if there were an obstruction (algae growing in there, fish caught in it).