Pics seem to work about half the time for me. The wav pumps are great. Powerful, nice control. Made a bit more noise at first than I was hoping for (less than the old vortec pumps) but quieted down nicely after break in. My wood floors seem to amplify sound...next tank will be on carpet. I do pull them out every month or so as they seem to gather algae in the back section of the pump. They move more water than the older mp40 as well. The top power they run at in my tank is 75% and they ramp up and down from that. I have them at 20% or so in the evening so I never notice the sound. Overall I recommend them highly.
