"B-B-B" was a quick shorthand for PoolDoc's concept of buying most of your pool chemicals at the grocery store. Bleach, Borax and Baking Soda. You can also buy Washing Soda there, but you buy Muriatic Acid at a hardware store and SOME pool stores. CYA and PolyQuat are generally only available at pool stores or pool sections of some department stores.

Bleach is for your chlorine (same as "Liquid Chlorine" and some types of "Liquid Shock"
Borax is to raise pH SOME pool stores sell another borate compound but both work pretty much the same and raise your borate level (Borates inhibit algae)
Baking Soda raises your Total Alkalinity and is EXACTLY the same as ALL T/A raisers sold by pool stores--Sodium Bicarbonate, aka Sodium Hydrogen Carbonate. Biogard's "Balance Pak 100" is...baking soda.
Washing Soda raises both your pH and your Total Alkalinity and is EXACTLY the same as things like "pH Up!" and "Balance Pak 200" (biogard). They are all Sodium Carbonate.
Muriatic Acid is the best way to lower pH as it is diluted hydrochloric acid. It's used in all kinds of applications from cleaning stone to etching it. You CAN substitute Dry Acid (called by various brand names) but they are all Sodium Bisulfate.
CYA, or Cyanuric Acid is pretty much only sold in pool stores.
PolyQuat or..."Poly (oxyethylene (dimethyliminio)-ethylene (dimethyliminio) ethylene dichloride) 60%" is called all kinds of things: Mustard Algaecide, Black Algaecide, etc. but it's the only algaecide we recommend. It's best use is as a PREVENTATIVE in case your chlorine goes too low.

But "BBBWMCP" doesn't roll off the tongue the way "BBB" does!