I have a 54 gal All-Glass Aquarium corner tank with built-in overflow. I have the Mega-Flow Sump model 1 by the same company that is made for this tank. The manufacturer suggests the use of an ASM G-1 protein skimmer, which they claim fits in the sump. The skimmer is rated for 100 gals. Does anyone have any comments on this skimmer? I was looking into the MRC skimmers as well but not sure if one will fit in my system and the MRC-1 is rated for 175 gals, which may be overkill in my case.