I have a similar tank. 72 x 24 x 30. I have the Reefmat 1200 and have hooked up both returns to the same roller. Works beautifully.Planning a 72x30x24 bare bottom tank with a large basement sump.
If I run two Vectra L2 (3100gph) pumps are approximate 50-60% power so over 3000GPH.
Fleece rollers handle approximately 2300 gph. I can fit two rollers but not sure if I need them.



