Ya 1guy, I suppose I could have made the baffles a hair shorter it is a pretty full sump, but too late now! The display FINALLY has enough water in it and has been running all day, got the water flow tuned it pretty good. I am going to pick up a filter sock tomorrow at local LFS to get the dust from the sand cleared out grrrr freakin sand.
Krish, last night I shut off the return pump to see if the sump could handle the water load. After the overflows emptied, all the sudden the rest of the tank was lowering and lowering and lowering. My heart skipped a beat as I imagined my house flooded with water because I didn't know what was happening. Then we realized the return nozzles where siphoning out the display and dumping it into the sump through the pump! I guess we should shorten the return nozzles a bit.....