My understanding is that no poo is a cleansing conditioner. Low poo is a sulfate free and silicone free shampoo. I think that a clarifying shampoo may or may not be sulfate free. For example I have a clarifying shampoo that is sulfate free called Avalon Organics Clarifying shampoo. So it is both a low poo and clarifies. I consider any low poo with cocoamidopropyl betaine to also be a clarifier. So I would consider SM Hibiscus a low poo but not a clarifier.
"More people would learn from their mistakes if they weren't so busy denying them." - Harold J. Smith.