Dual inflow with shared outflow

[miki76]

Hi All, I am building a custom circa 500l / 125 gallon reef tank. It is going to be 70 inch long and only below 20 inch deep.

I want to put two inflow/outflow pipes on opposite corners for maximum flexibility of flow management. I will use a Red Sea reefrun 4000 for each of the inflows.

I would like to have two outflow pipes connected to Red Sea Reefmat 2100 but this of course would require the two pipes to merge before the reefmat.

Has anybody have experience with such setup?
I wonder if the two flows merging could lead to any noise issues or could cause any other problems I should consider upfront?

Thanks for any advice from more experienced reefers!