lots of people do, but do a calculation on here to see what you are at.
http://www.reefcentral.com/calc/hlc2.php. No reeflo's on there, but you can use it to find the head loss, then go here:
http://www.reeflopumps.com/lowspeedhighflow.html Reeflo's lose flow very quickly if there's any back pressure, so most of the time after fittings, etc, you have 9-10' of head and are already at 1000gph. An easy way to do reduce more flow is to use a Tee and have a ball/gate valve that drains back to the sump. THat will redirect the flow without back pressuring the pump.