Spa Complete - A 3-in-1 high-intensity formula for spas and hot tubs. Keeps water AMAZINGLY clear, softens water and keeps your spa clean. Contains soothing lavender and eucalyptus extracts. It smells sooooo good! For best results you'll want to add this product after a fresh fill. But, if you want to do it at another time just be sure to adjust and balance your water prior to adding. Just 1/2 capful per 250 gallons of spa water so this bottle will last you a long time! Give it a try, you won't be sorry!