I just bought the : Dual Laing D5 Station inkl. 1x Alphacool VPP655. its a reservoir with the pump.http://www.alphacool.com/product_info.php/info/p1160_Alphacool-Repack---Dual-Laing-D5-Station-inkl--1x-Alphacool-VPP655.html
i bought it to replace my alphacool eheim 600 pump station.
The vpp655 creates a lot of noise and my pc now sounds like an aquarium. it keeps holding air somwere in the pump house and no mater how i turn it it keeps making water flow noise besides the pump noise.
level 1 to 5 makes no diffrents.
The eheim 600 is a submerged pump so it very quiet and i think i will change it back.
And it only costs 53 euro's and the vpp655 that i have with reservoir costs 140 euros and is driving me crazzy.
I hope its a mailfunction or something and that alphacool is going to solve this buth i am still working on this.