I just took some flow out of my tank. I was running in a 65 gallon (3x2x18) 2 Modded 6025s (which pack a serious punch.) Mp40, an Mp10, and an ehiem 1262 for the return.
So..approx a max of
900 for the return.
3,000 for the Mp40
1575 for the mp10
and between 1000-1200 per modded tunze (is what I understand it should get)
soo.. 118 turn over for me
Either way I pulled 1 tunzee, and I'm thinking of pulling the second I've been running them as things sit for 6 months or so now, I'm starting to think I really don't need more then the mp10, mp40 and return, but I like the good coverage of all 4 pumps.