AHHSOME! it really is. This is the cleaning product we use when purging and flushing hot tubs. Every hot tub should be purged / flushed at least once per year if not twice depending on usage. Biofilm builds up from bodily secretions in the spas plumbing causing dips and spikes in sanitizer usage. To have the best run for your chemistry and save money long term we reccomend flushing with ahhsome minimum once annually. 

Add ahhsome to a full, HOT and running tub, run all jets with air controls off for a minimum of 30 minutes. Use a misting hose with fresh water to prevent foam buildup. It is reccomended to use eye and skin protection ( gloves ). After purging for 30 minutes begin draining the spa and use the hose and fresh water to rinse the sides AS THE TUB IS DRAINING to prevent sticky biofilm buildup on the acryllic or in the jets. Use a green NON 3M scrubby to lightly wipe the shell and any surfaces. Fill the tub hlaf way and purge the plumbing with fresh water before final drain and refill.