The pot has three holes on the bottom and it's over a plastic tray.

I've been giving it water and it has been responding a little bit. When I put the moisture meter today, i noticed that the first couple inches are damp, but beneath that it is very dry and hard. Maybe the bottom of the roots aren't getting water?

Icabod: The ph going in and out is about 7/8, though I'm not exactly sure because I think my meter may be a bit busted.
Can I buy that product at a nursery? Is there a commonly available non-cannabis alternative or something i can buy?

Thank you both for all of your help.