I have spent the evening reading all the FF Sticky's here and there seams to be two basic designs for Foam Fractionators.
Water flowing down a column over some kind of media that breaks the surface tension and allows the DOCs to be extracted at the outlet as foam. This is the way the Clarity Units work. (drawing on left)
Air rising up the column where the DOCs attach to the fine air bubbles and the foam is extracted at the top. This design is popular in the salt water reef hobby. (drawing on right)
Both designs have proved to work if properly designed and fine tuned.
So I have some questions and thoughts for discussion.
Is one design better than the other?
Skimmer water is better than BD water as DOCs tend to rise to the pond surface, True?
FFs work better with warmer water and high feed rates when more DOCs are being produced than in the colder winter months, True?
Will Ozone enhance the performance of a FF? And if so, should Ozone be injected after the biological stage of filtration?