Ok, so when I move my tank in September, I'm going to take the opportunity to fix a bunch of things about my set up that need fixin. First on my list is, I need to drill my sump so the skimmer can be run externally. \r\n\r\nSo, this is my skimmer: [url=http://www.superskimmer.com/EVO_750.htm]EVO 750[/url]\r\n\r\nHow do I know what size to drill the hole? The bulkhead that is on there is sealed to the plastic, so I suppose I'll have to get a different one and connect the two with some piping, and put the gate valve inside the tank. I guess? \r\n\r\nAlso, what supplies will I need? What [B]might[/B] I need? \r\n\r\nI suck at DIY, so even if it seems obvious to you, please spell out everything for me... this is my "noob" area. You can't possibly put enough detail. :mrgreen:\r\n\r\nthanks in advance.