bubbles from the sump

[marinelife]

Hey all I did a water change and now I am getting bubbles in the main tank. The only thing I think that has changed is that the caulerpa has changes positions now letting the bubbles pass. I added a plastic container under the pipes from the overflow, doing this to try and make the bubles go up. I also added a 90 degree pipe to the intake of the return pump facing down. I have a few dividers in the sump to act as baffles and Live Rock as well. Does anyone else know what else I can do to help stop them