Came across this thread on reefcentral today. Someone compared using bleach vs. hydrogen peroxide for cleaning FILTER SOCKS. Apparently hydrogen peroxide is far more environmentally friendly and potentially safer for your tank. Take a look:
http://www.reefcentral.com/forums/showthread.php?t=1943735
http://www.reefcentral.com/forums/showthread.php?t=1943735