Ok, easy but dumb question. On bulkheads.

[wentreefgirl]

Does the foam washer stay on the inside side of the tank or the outside.

 

[Jeff]

The gasket always goes on the wet part, and not on the side with the nut but the actual bulkhead.

 

[Kensn]

Here ya go Karen, http://www.reefkeeping.com/issues/2002-02/jg/index.htm should clear it up for ya, and alot of good info.