That makes me feel better. I did add a filter sock but i did it to help with microbubbles. I dont think i need to worry about much settling in the sump because i have a 1000 gph pump to the skimmer and a mag 3 return on the tank so thats about 1000gph rollin through the 20g after head loss. Nothing settles in the 30g display due to the 3x maxi 1200 on a wave timer 3x on full time along side a korrila 4 on full time. The skimmer is huge for the system so i am hoping i can pull it off bare bottom. What worries me is keeping the alk and salinity as stable as possible, i hand dose everything except kalk, thats why i had such a large sump on a smaller display in the first place.. I appreciate the input, and yes all the rock has been in the system for at least a year already.