So sence i setup my 100g i have been running a PowerJet 5000 ( 1640 GPH ) through one return.. witch im thinking i will split now .. as i decided that maybe my tank needs alittle more water flow due to the build up on the sand bed of cyno so i hooked up a PowerJet 7000 ( 2300GPH) and well .. I turned it on and HOLY CRAP! there was soo much water flow that it ripped an acro frag right off the rock!

So i came to the conculsion that i will just keep the 1600 GPH and just find away to split it up...