Spike,

I'll add in a few bits here..

From experience I can back up what Tony has said about flow in the sump. Go for hte minimum or a decen't flow rate through the sump. Say about 700-900 GPH. Then add in some sort of closed loop.

I am setting up a new system and will only have a small return pump but have a MAK4 on a losed loop system. I am also looking into a SCWD on say a MAG9 or 3MD for that alone to create some more random flow patterns.

For my returns I went shopping down south and purchased Loc line tubing. It allows me to angle the flow in any direction/angle I chose.

Take a peek online for that stuff. It is excellent for this application.

thanks, do you know where i can get some of this lock line stuff?

http://www.loc-line.com/

I bought mine from Champion Lighting.

http://www.championlighting.com/

That Loc-Line stuff sure looks neat. Different nozzles and stuff too. Hmmm, more toys to buy. :biggrin:

The switching of the SCWD is very quiet
Spike - Wendell - Ocean Aquatics - carries Loc-Line. Wendell is in BC -

thanks, i'll have to give him a call.....if i want to get ~1000gph should i go 50% from the sump and %50 closed loop? or what would be best? thanks.