What size and brand of pump for closed loop?
 

What siz and brand of pump do you need for a 300 gallon if you were gonna go with a closed loop system instead of powerheads?

6 outlets. 1 intake.

Im using a Sicce 4200 series. I guess it all depends on what your inlets and outlets are sized as, as well as what do you want to achieve with your closed loop?

Where did you get that pump from?

Something along these lines:
http://www.canreef.com/vbulletin/sho...threadid=78568

Or maybe a Reeflo Hammerhead. Depending on the diameter of your plumbing of course. There is a used one here: http://www.canreef.com/vbulletin/sho...ght=hammerhead

lot depends on where the pump will be. I've got a Dart on my CL and is okay with it below the display, but no way would I have my standard Barracuda on the CL due noise.

my snapper pump at 2600G/hr has alot of suction with only 1 inlet...........................
other than that im happy with reeflo pumps

maybe try a dart? 3600 G hr so thats 600 g/hr per outlet which flows pretty quick thru 3/4 PVC

Dart's good on my 145gbut for a 300g might be a little lacking. 2 Darts in parallel?