the intake on mine is shortened, so it doesnt the intake tube doesnt stick so far into the tank.
i'd say it hangs off about 3.5 inches, i'd give ~5 for clearance and ease when taking it off for cleaning. you're welcome to stop by and check it out.
i dont have any skimmate shots...but here is 2mins after install
and top down shot of the tank it's on.
eric