I'm looking to buy a dosing pump to dose two part, and kalk. I'm leaning towards an aqua medic 3 pump system right now since it's in my budget. Have any of you used these pumps, and how do you like it? It seems to get mixed reviews so I'm kinda hesitant to pull the trigger.

Here's the one I'm thinking about buying.
http://www.marinedepot.com/ps_ViewIt...or~~tab~0.html

Thanks, Glenn