return pump size?

[viperfish]

I replaced my two 3500's with one 6500 about 6 months ago and no issues yet, I'll keep my fingers crossed. I do have a Mag 12 running my downdraft skimmer and it is dead silent, been running for a year and a half and hasn't failed me yet. Funny thing on the OR6500, they screwed up on the LPH rating and the box says its slower than my 3500! I used my best guess on the 1800 GPH so I'll take your word on the 1700 GPH.