hello people,i purchased a 48inch bubble wall a few days ago,im using a waterlife ghost air pump to power this wall,the pump has 2 outlets,so im using the two outlets and have connected them to each end of wall with air line,but im not getting the affect i should be getting,is this pump not powerful enough to do the job i want,or should i be operating with 2 pumps,a pump connected to each side?.any advice much appriecated.