Help with overflowing sump system

[Myka]

Twist the black loc-line pipe so the output is closer to the surface and/or drill a 1/8" hole in the plumbing somewhere to cause a siphon break (though I don't really see a spot that would help you out). If the black pipe is too short, add more to it. The output should be as close to the surface as possible without causing splashes or a vortex. This will minimize the back siphoning.