problems with mag 7 return pump, plz help

[golfbomber]

i have a mag 7 for my return pump and seems to be mixing with air somewhere and now i have tons of micro bubbles in my main tank. this has happened b4 but then i just move the mag pump and it stops. this has been happening to me for a week now. any ideas?

 

[bassnman11]

Check all plumbing connections for tightness and make sure you have plenty of water over the pump intake so you dont suck air.