so i'm finalizing my custom sump design and will be getting it done this weekend. i have a very odd and not deep space (6.5" deep) so i'm doing what i can with it to work it in conjunction with an algae scrubber.\r\n\r\nthis is what i had first... (hadn't drawn in the ball valves at this point)\r\n\r\n[IMG]http://i687.photobucket.com/albums/vv233/monkiboy/sump-1.jpg[/IMG]\r\n\r\nthe specific measurements:\r\n\r\n[IMG]http://i687.photobucket.com/albums/vv233/monkiboy/sumpfinal-1.jpg[/IMG]\r\n\r\nanything you would change?\r\n\r\ninstead of having a smaller separate pump, i also thought maybe this would work. splitting off a tee from the main return with a ball valve for the algae scrubber.\r\n\r\n[IMG]http://i687.photobucket.com/albums/vv233/monkiboy/sump1-1.jpg[/IMG]\r\n\r\ndo you think a mag 9.5 would suffice to run return to my DT (up seven feet) and provide sufficient flow to my algae scrubber? with 7' of head loss, danner shows the 9.5 pumping at 660gph. \r\n\r\nit would be nice not to have two pumps submerged producing a higher temperature in the water and save money of having to buy a new pump for the algae scrubber. i currently have the mag 9.5.\r\n\r\nthanks for your help and opinions!