http://www.youtube.com/watch?v=Ufq3VnRCXK8
Turn up the volume watch the entire video.
Note the sound your hearing is the house being out of the water in the sump once he moves it under water there is no noise. Also note the huge volume of water coming from the drain with the valve. Also note you can see no micro bubbles in the sump or the main tank. I have no idea what his flow is but it’s high. I know in the past the max flow I used was 3800 gph out of a 1” pipe. I know your almost to the point of having this thing plumbed up and running so your energy is getting low but your excitement must be growing. I just see you running into the wall with the bubble thing and saying “I’ll live with it.” But trust me you do not have to. Now the reality is this will coast more money out of your pocket and more time out of your day to get started but in the long run you’ll save yourself a lot of time money get a better overall viewing experience.