Thanks guys. As for mode, I am going to do what dz6t said. What about placement? On each side of the tank facing each other or the one on wave mode higher than the one on "else" mode?
They put out some serious flow. Mine are in a 65 gal. I had them set to low and placed like dz6t said about 8" below the water line. It looked good when I set them up. Came home from work the day and had a 10" mountain of sand in the middle of the tank. I had to move them to opposite sides of the tank and they are both running on else.
This why I bought 2 WP10s and the twin controller for my 40 breeder build so I can run on Else mode full blast. I watched reviews on YouTube and read them on here and RC. People who bought a WP25 for a 30 gallon tank were basically screwed. They had to turn it all the way down and couldn't use Else mode. They were stuck on W1 & S3(50%) and that's all they could use. When I was running the tank with water & vinegar to clean it without the sump or return there was plenty of flow out of 2 WP10 plus their compact size is ideal. I'd only move up to WP25s if I had a 75 or WP40s if I had a 100 gallon plus tank. Two WP10s and the return is going to give me me 2250gph flow in the DT. That's 56x turn over on a 40 breeder. I'm only keeping LPS and Zoas so it should be fine.