625 gallon STOCK TANK using BBB

Oh GOD PLEASE HELP AN OLD LADY OUT!
I purchased, and set up (with an Intex filter cartridge pump), an 8' X 2' Stock Tank Pool.
Due to it's size I decided to use the BBB method of maintaining it's water ~
I'm not a chemistry major and I just DON'T GET IT!
How much of these items (Bleach, Borax and Baking Soda) should I be using daily??
Right now my PH is sitting at 8.2 and I can't seem to get it into the "idea" area.
PLEASE HELP!!! (and don't say stuff like ppm because I just don't get it!)

Sorry, but a 600 gallon stock tank with no pump and no filter is not an appropriate application of the BBB Method . . . or any other method of pool care, because it's not a pool, or even a spa (which we don't support, either).

I realize that being economical is important, but there are times when the need to economize means recognizing that certain purchases or recreational activities are just not practical. This seems to be the case here.

I don't know what else to say.