I have the new coneS co-2 and love it on my 120g 4x2x2 sps dominated reef tank. I also noticed that the skimmer is rated for 350g and is only a 6in diameter and 22in tall. The only reason I can think of for the increased rating is the fact that the pump is not located inside the cone body (which is frequently the case and reduces space for bubble interaction) and the newly designed bubble plate. Maybe they really feel the bubble plate is worth that much more.
sn4265;22007926 Are there any drawbacks to having a grossly oversized skimmer? .[/QUOTE said:to answer this question.....YES!!!!! There are huge drawbacks to a grossly oversized skimmer. Skimmers do not work well or consistently when they are oversized. You cannot maintain a stable foam head. It is very frustrating. definitely get an appropriately sized skimmer.