When I first got my arro the next morning I was sitting and watching my tank when My stingray decided to beg for food in the way it normally does which is run up the side of the tank wall and my arro happened to be right there. My arrow jumped out of the only open place, which was a 4"by2" opening and went 1.5 feet and landed on the glass top, since then all holes have been pluged up other than a couple very small ones for air flow and my arro was about 6in at the time.