Single Digital Dosing Pump - input?

[Myka]

Is anyone using a single digital dosing pump? One that has built-in controls? I see there are several on the market, but I haven't used any of them, nor even seen any of them. I have several clients that need to dose just alkalinity (usually softy dominant tanks), and I'm looking for a reliable, economic way to do so.

I hear Bubble Magus has one in the works, but I don't think it's released yet. On Google search I see some brands such as Marine Magic, John Len (AquaHouse? CoralVue?), IceCap, TMC Reef. I'm not sure if any of these are available in Canada. I like the look of the John Len one as you can add a single slave unit to the single master which would be handy if the client acquires more hard corals and then needs to dose calcium too. It looks like the John Len one might be discontinued.

John Len dosing pump

Ice Cap dosing pump

TMC Reef Easi Dose