yep just got ac-110 at petsmart for 40 bucks.with the price match.I'm running 1-ac-70 and 1-ac 110.on my 65g...actually the ac 110s are only 40 bucks on petsmart.com. but 2 ac 70s would be 600 gph, and one ac 110 would be 428 gph or 500 gph. but either way with 2 ac 70s you get a lot more filtrations and you have two filters like people above said so if one breaks you still have another one.

