[Ax Man]

Hi all, I have been enjoying this site for a couple years, and value the material/ advice here.
Iv'e been landscaping about 20 years, self employed, and come from a farm upbringing and natural resources education in college. My wife and I have built a nice small business in a rural area. Of course like all of you I suppose I have looked over ADI's catalogs, and I went 1 step further and attended a build a pond day. We have a client with an earthen, spring fed pond. It's approximately 20X30, ovalish, and maybe 4 feet in the center.
When I first viewed the property, it was covered in watermeal. I refered them to a local applications business who wiped it out for a nice sum.
At the same time, I gave them a long term solution Ala' Eco system.
Filtration/Waterfall to aerate, and plants to use the excess nitrate.
So now after a year and a half of paying the apps guy to kill weeds and algae blooms they are ready to buy in.
I plan on building a bog filter at the Southeast end, to make use of the prevailing wind, and try to skim off surface debris. The water level is said to fluctuate some, (though I have only seen maybe 6 inches of change in 2 seasons)
Have any of you built some thing like this?
My plan is to dig the hole, line it, construct my wet well of corrugated pipe, fill with rock, then break through to the pond with a lined channel of maybe 15 inch depth.
I think if I have it appear as a stream/ outlet and then fill the margins with plants It will serve my porpose.

At the top of the slope (maybe 5 feet) build another planted bog, with stream outlet and waterfalls to the pond, travelling in a north west dirrection.
My question is mostly on the effectiveness of the pond level bog, with a 4500 gph pump. Will it skim the surface too?
Sorry for the cafineated post...