Need an advice to decide which vertex dosing pump

[htfn]

Originally Posted by reeferfulton

i vote neither.
i have owned both models and the original ghl..the ghl was silent compared to vertex.
dc model is ridiculously loud ! steppper is still louder then ghl.
i would suggest lestning about the ghl2. or grabbing an old style on sale.
just my opinion.

I never thought about GHL. I have to search about it. How this pump works? I understand this unit needs controller or smartphone. Is it easy to set up? A reason why I'm choosing Vertex is seems to be easy set up. Unit calculate dosing rate.
Oh, if your GHL motor or any parts fail then where do you get parts from? JL deal with Vertex and it's easy for me to get a parts if something fail.