The packaging for this item has been changed and this item is discontinued.  Try: Ahh! Some Hot Tub/Jetted Bath Plumbing & Jet Cleaner Single Use (4 Pack)

Or, of you prefer the jar, try Hot Tub Serum

Ahh-some Hot Tub/Jetted Bath Plumbing & Jet Cleaner is a unique and environmentally friendly gel formula that, when used as directed, removes the build-up of bio-fouling inorganics, oils, lotions, cosmetics, exfoliated skin and other contaminants – from the plumbing, jets, and shell of typical hot tubs and jetted bathtubs.  It is a great spa flush.

Cleaning Instructions: For jetted tubs, at least 1/2 teaspoon of gel is required per purge, no matter the size of your tub. For hot tubs, use 1 teaspoon of gel for every 125 gallons. Wipe off any excess gunk or grime from the tub surface after purge to complete the cleaning process.