microbubbles!!!

I've been running my skimmer for about 2 weeks now and I'm noticing a lot of microbubbles still, I've placed the bio bale side next to chamber 1 instead of chamber 3 and that helped a little but I'm not sure what to do? Any help would be greatly appreciated, I'm new to this site so I'm still...

I have a 75 gallon tank with an overflow box, a drain pipe taking water down to my sump which is a 20 gallon long tank with a GX1 Skimmer and a rio 2100 return pump. The micro bubbles were really bad so i made 2 baffles out of plexiglass and used 3/4" PVC pipe to hole the baffles up, now the...