Well, also.......you have to consider that anything that creates more turbulance, creates more flow restriction, because the water is not travelling in a straight path anymore....its bumping all against itself as it exits.. So maybe a bigger pump is a good idea.
The Tim The Toolman urge always gets me when I pick out a pump.Besides if it proves to be too much, you can always restrict the flow down to your sweet spot.
Bead blasting can increase your surface area 2 fold.
It works for me