Micro bubbles cant be stopped!

I have a recently cycled 125 dt with a 30 gallon sump. I have a serious micro bubble issue. Where the water comes into the sump through pvc pipes there is massive amounts of bubbles. These bubbles then travel past the heater and skimmer etc. I then have 3 baffles and some sponge and some filter floss. The micro bubbles are still entering the next chamber where my return pump is housed. I have tried just about everything I can think of and I am still losing this battle. At wits end here people! Please help! By the way my return pump is rated at 1300 gph. I would guess I have around 800-900 gph return flow maybe more?

 

i have heard that if you put an elbow on the end of the pipe that that helps but i have no experience with that so i dont know if its true

 

Pics of your plumbing and sump would help.