Skimmer article/study

[Palmer]

I see your point money pit but as I read the article it differentiates between what a skimmer can remove and the organics that are not possible for a skimmer to remove. I may be wrong in this but I believe the 35 % refers to the part of the whole that it can remove. When talking water changes I assume all organics in the water can be removed. So the percentages would be apples to oranges... I think

[Money pit]

There isn't anyway to know the amount of organics the skimmer can''t remove so I didn't add it to the equation. But you're right it would make a difference. Think of the build up if you never did water changes, seems kind of nasty.