Not sure about the sump pump. I set my overflow to drain into an area on land - a vernal pool of sorts, I guess - which will contain plants that thrive in wet conditions but can tolerate dry stretches in the summer. When I siphon out excess, as I did last night, I just hook a hose up to the spigot, connect another length of hose to that and set the open end in the pond. Turn the water on and disconnect the two hoses at a point lower than the hose in the pond and you have a (slow) siphon.
I like the look of your pond as well. Those areas where the liner sticks out would bother me though. Not sure what I would do about that spot in the middle with the potted plant on it.
I'm adding a small flagstone walkway in between the pond and the garage to get back to the pergola area. You can see how it's done in the image below.
[sharedmedia=gallery:images:3568]
[sharedmedia=gallery:images:3567]
[sharedmedia=gallery:images:3566]
I like the look of your pond as well. Those areas where the liner sticks out would bother me though. Not sure what I would do about that spot in the middle with the potted plant on it.
I'm adding a small flagstone walkway in between the pond and the garage to get back to the pergola area. You can see how it's done in the image below.
[sharedmedia=gallery:images:3568]
[sharedmedia=gallery:images:3567]
[sharedmedia=gallery:images:3566]