Good advice, thanks! And I was wondering what that sandpaper was for! grin

Originally Posted By: FireIsHot
JKS, I'm going to copy this link to Tracy's thread. Good visual of the O2 system.

Just a couple of things, I don't leave the diffuser in the water without O2 flowing. Water will leak into the diffsuer if there's no flow pressure. Also, there may have been a small piece of sandpaper in the box. That's for cleaning the stone if it gets algaed up, but I've never needed mine. It's in a plastic baggie with my O2 stuff.