my build is using an ocean runner 3500 for the in-sump return. heard good things about it & it has a relatively low wattage rating, so not as much heat added to the water & more flow than say a mag7 (mag7=70w / or3500=65w)...also prices out less than a flow comparable mag9.5
Jim, glad you have had good luck with your ORs. Not everyone has problems with them, but enough do that people should be aware of the issues, especially when they are asking for "reliable" "problem free".
Very true Jim. The Eheims are one of the very few internal pumps that can be said to be close to problem free. They dont have start up problems, they are very quiet and people have run them for decades without failure. Problems reports are extremely rare.