Here's the 12' tall protein skimmer for the new 30,000 gallon shark tank at the Warsaw zoo. Manufactured by Sander from Germany.
Hi Shawn
I think if not mistaken the Sander skimmer's are similar to RK2. Older in design. High wattage but more important low air input.
After running several skimmers,mostly high end. I must say, whether or not a cone skimmer will perform better I dont think we will ever know the answer, but ..... I can confirm, based on my experience , that a cone provides a more stable foam head, possibly due to the fact that the water level is lower than in a cylinder skimmer, which provides more water drainage and a higher or taller foam head. Similar to a beckett. Drainage is also discussed in the Volume 1 Julian Sprung book.
Please correct me if I am wrong.