Unless you're using styrofoam peanuts as gravel, you'll be fine with the 700. I'd put it behind a piece of driftwood to hide it some.Is the 700 that I got going to be too much? I dont want to blow gravel or rip out my plants, lol.
It's your tank, do it as you see fit.Does the flow pattern need to be unobstructed? In other words does it need to be on one side of the tank and have a clean path across to the other side?