How to make my overflow box quiet??

[Low_KingMatt]

So i got this overflow box with two "U" tubes and there quite noisy any idea how to make them quite? or less noisy?

[Big_Pun]

http://premiumaquatics.com/aquatic-supplies/GEO-SP1.html

http://www.rl180reef.com/pages/standpipe/standpipe-ken_stockman.htm

http://home.everestkc.net/jrobertson57268/HGB/HGB_construction.html

[Low_KingMatt]

thank^^ i appreciate it.

[Big_Pun]

knock your self out and figure which one works for you. I've used them all including a magi muffler but they are big and I don't know what room you have in your over flow