Trying to decide on appropreate skimmer for new 125g reef.I would rather spend extra${100} for larger model now, then to regret having "under-purchased" later. I plan on mounting "in-tank" and plan to keep assorted hard corals/clams etc. If the doc 9015 is not overkill in a {-} way, I would opt to have overkill. Also I have some confusion reguarding dimensions, model 9015 measures L4.9XW4.4XH18.8...does this include collection cup?THANKS FOR HELPING WITH PURCHASE:rollface: