Yep, that was my thought also, after i had one with the DC pump.. And the sm201 is the a.c version..Okay well that sounds perfect then!!! I might look for a skimz that doesn't have the dc control then cause that doesn't matter to me at all and it's more expensive so I'll check out some other skimz....the one you got is insanely big!! Hahahahaha
And yep, lol, the 251 is a pretty big skimmer.. I had to squeeze it in the sump.. Lol... I think I've seen one larger in person on someone's tank, but that was a 320 display and i think he had a 100 gallon sump.. Big system.. And the 203(201)is a nice sized skimmer also.. For sure not a nano skimmer by any means..


