Got the new pump yesterday, hooked it up today. It's only a little bit louder than my old one (although it's twice the size). It pushes out twice or three times as much air. The surface boil is pretty intense. It's got to be close to maxing out the capacity of my membrane diffuser. I just ran it for about 5-10 minutes. Tomorrow I'll run it for 20, and double each day from there until I put it on a timer to only run at night. I've got trout in my pond so I don't want to mix the water in the heat of the day. I'm very happy with this purchase thus far. I'll try and get some pix up this weekend. Does anybody have any other tips as I get started re-mixing? With the amount of water those bubbles are moving I suspect I need to be careful to ease it in.