But that's just the pump, how much is the controller?
Ok, if you compare apples with apples, Lets call it product "X", a well known brand.
Koralia 4 - 5500LPH - 14W - $60
Product "X" - 5500LPH - 18W - $227
Ok, Product "X" is a controllable type pump but this price excludes any "true" controller and only includes a pump and a variable power supply, allowing flow to be manually changed.
The Koralia is the pump only!
The controller is $239 (2 channel), however I want to run them off an electronic controller that I have, not the original, but this is the beauty of a LV pump, they say it the pump can only be used on there controller but I think it sales talk, I'll do my home work!
But for arguments sake, lets take 2x Koralia 4 and 1 controller = $359, 2 of product "X" = $454, and then there is still no controller.