The large bronze one, but my well is above deck and I feel this is really the way to go. As mentioned flow is key as is round or oval shape is Far better imo. Gogs will swim in the corner, stay there and die. You don`t want any plumbing in the way inside the well as they get beaten every time they hit obstructions.
If the flow is right the bait can just sit there and get h2o/o2. Put your intake jet at the of end of the "Nascar" turn to the front straight. I think this is the first time I`ve ever typed Nascar.
Cheers,
GFS