This may be a dumb question. I just got a Dnwb-200 off cl. It's brand new never even touched water. I'm in the process of setting up a 93 cube tank and want to use this skimmer. Is it possible to use this in my sump? Or does it have to be external? It's so darn big I don't have room under my stand unless I can put it in my sump. Any other thoughts about this skimmer would be helpful also. This will be my first tank that uses a sump so all this is new to me. Thanks. Sump is a 40 gallon breeder