sump drain making huge bubbles, please help

Read the title. My drain into my sump is making huge bubbles. I have a stand pipe thing for my drain in my overflow. I figured it was getting enough air in the top so I made the hole bigger but has huge air bubbles coming from my drain hose.

 

does your drain go under the water line? what size return pump do you have? you may have to much flow for the overflow to handle. try dailing back the flow from the return pump.

 

my return is a ehium 1262 but it is T'ed off a few places and doesnt have much flow in the tank. If i dial it back really slow I dont get air bubbles but it is barely any flow.