Sump plumbing

[jmags080307]

I have a 40 gallon breeder with a 20 gallon long sump. I have a glass holes 700 GPH overflow with 1.5" pvc for the drain. My return pump is a Jabeo dc6000 and I have 2 returns using 3/4" pvc for the returns. Just want to make sure my pipe size is okay before I plumb it up and fill the tank!!