The AC110 is rated at 500gph. 500 gph x 2 = 1000 gph, which seems like enough. Personally I use tank volume x 10 as a minimum for filtration. I prefer tank volume x 15 or better.
If I were you I would consider either making a USJ system, or just placing a couple power heads in the tank to eliminate dead spots.
If I were you I would consider either making a USJ system, or just placing a couple power heads in the tank to eliminate dead spots.