Looks like my Quiet One 4000 is going to be too small for a 90 Gallon tank.
There is a 30 gallon sump as well. 2 - 90 elbows , 1 - 45 elbow, 2 line manifold on a 1" return line. also a ball valve.
2 ft of horizontal and 4" of vertical.
Pumps I am looking at are:
#1 Sedra KSP-20000A
http://www.conceptaquatics.ca/index....p-1000a-8.html
#2 Water Blaster HY-7000W Pump
http://www.conceptaquatics.ca/index....0w-pump-1.html
#3 Lifegard Aquatics Quiet One 9000 Water Pumphttp://www.conceptaquatics.ca/index.php/lifegard-aquatics-quiet-one-1200-water-pump-6.html
or Your suggestions on #4