Awesome wicked thread on RC for rotating sprinkler heads

[albert_dao]

Looks like I've got a new project for the tank when Cracker is finally done building it:

http://reefcentral.com/forums/showth...5&pagenumber=1

Anyway, if you read through the thread, there ARE small metal parts in the head that can't be removed, but then again, Magdrive pumps have metal screws that rust in tanks and no one seems to give a damn.