I noticed that the e-mail has been sent from Red Sea regarding their new Skimmers. I've noted that it comes in three sizes, the RSK 300, 600 & 900. The three sizes given are rated for mixed reef tanks are 600l, 1200l and 1800l. Is this an indication that in the future Red Sea are going to be offering some even bigger tanks than they currently do? I'm aware that some people have SPS dominant tanks (300l, 600l and 900l), and others have fish only tanks (900l, 1800l and 2700l), but I think the majority are mixed reef.