Of course, there's
B-B-B (most people write it as "BBB") for "Bleach, Borax and Brightener"...OOPS That was an old TV ad! (that'e where I got the idea...) B-B-B is Bleach, Borax and Baking Soda
POP and POPP: Pool Owner Patience, Pool Owner Patience and Persistence--the most important ingredient in cleaning up an algae-filled pool.