Yea, but organics dissolved in the h2o cant be removed by mechanical filtration.
We will see...my water is good now. And I am over filtered, always just looking to get the next little edge.
If dissolved organics is a problem, you can either get a larger tank or do larger/more frequent water changes. Here's another solution:
http://www.koienterprise.com/Clarity-Protein-Skimmers/Clarity-Protein-Skimmers-p-547.html