I'm currently running it out of the water. I have a bulkhead in the side of a rubbermaid running to my 4md-sc up to the skimmer which is about 6" over the pump. I'm using a ball valve as i can't find a gate valve in this city, i can order one but it will be $4 plus shipping. :shock: Not likely to happen, the ball valve isn't really easy to adjust but it is adjustable. I set it by getting the water level about 2" from the second riser and opened the air valve until i got the fine bubbles happening and then had to back the water level down just a little bit. When you adjust the water level give it a second to lower or raise, it dosn't happen instantly.
Clinton
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