<a href=showthread.php?s=&postid=10496193#post10496193 target=_blank>Originally posted</a> by Kb-smoker
carlso63 its a fact that wet skimmate remove more DOC than dry. The collection cup is made to collect the skimmate not the riser neck of the skimmer....
With a skimmer neck that clogged up, it will hurts the performance of the skimmer.
The problem with your "fact" is proportionately you are also removing
alot more water with a slightly higher amount of organics.
Do you honestly believe a guy who "pulls" a half - gallon of 'light tea' is removing that much more organics than a guy who "pulls" 8 oz of solid sludge?
And the guy with the half gal is going to have to spend time and $$$ making up new SW to replace what he just threw out (eventually); he can't just use RO FW topoff or his SG is going to start going down... a dry skim can just be made up with RO FW and the SG won't budge - plus, since most if not all skimmers are sensitive to water level a dry skim keeps your level more stable whereas a wet skim lowers your tank water level (especially if you don't top off every single day)
Think of it this way... a daily 100% water change would remove 100% of the organics, right? So why don't the "best" aquarists do a daily 100% water change - since even the 'best' skimmer is not going to remove 100% of the organic load?
Because it is impractical, expensive and (water) wasteful; if a decent skimmer can remove, say, 90% of the organic load - is it worth the extra time / $$$ / wasted water to get that last 10% ?
I think not. IMO only thing "wet" skimming is good for is if you look at it as a small partial water change...
But I would agree that a clogged riser tube hurts skimmer performance; that's why i have to clean out mine every other day