Hello. New Grower Here

[Aang]

Is the Apera PH Tester and the Bluelab PENCON Conductivity Pen used for different things?

As for the water pump and air stone, would something like this work?

Thanks.

[SWSVIC]

I would stick to all blue labs for hand held readers, tried and true. See link below, great set to get you started on the right foot:

Bluelab PENGTB Grower’s Toolbox with pH Pen, Conductivity Pen and Probe Care Kits Amazon.com : Bluelab PENGTB Grower's Toolbox with pH Pen, Conductivity Pen and Probe Care Kits : Garden & Outdoor

I went with a little more specialized pump. Check this one out:

Hydrofarm Active Aqua Air Pump, 1 Outlet, 2W, 3.2 L/min Amazon.com: Hydrofarm AAPA3.2L Active Aqua Air Pump, 1 Outlet, 2W, 3.2 L/Min, White: Industrial & Scientific