Originally Posted by KrazeKajin
one of the main things is that most of the particles in the water that needs to be skimmed are in the top portion of the water. If you skim from the very bottom of a tank/sump, then you are bypassing the larger amount of waste which tends to float. This is why some people have a lot of foam on the top of thier water, the waste floats upwards and combines with bubbles from filters and what not to produce foam.
This is simply not true.....The main thing with the needle wheel CSS skimmers is they have to be within a reign of the water so barometric prerssure and water weight do not work against them. Its all a matter of physics and their placement in the water colum as designed.
The amount of foam is dependant on where and how you have yur bubbles adjusted inthe reaction chanber or main body..lower column of bubbles from collection cup makes for a drier skim, higher column makes wetter skim...Simply put too deep inthe water and a needle wheel super skimmer does not aerate or pull in suffficeint water to work as it was designed......Too high it produces more air and gets to be uncollable....