I have a 92 corner and can say I haven't had an issue with flow, but I probably set mine up a bit different than most.
I have a SQUID in the overflow on the return that then pushes water from one side of the tank to the other. I drilled small holes in the rim down the sides of the tank and hooked up black 3/4" vinyl tubing and the water is inserted into the tank in the front corners.
I also use 2 TUNZE 6000s. I've attached a few different images some might be a year or two old, but the setup is still pertty much the same. I think the first one is probably the best for seing how the tubing is ran.