Super cleans plumbing systems of hot tubs prior to drain and refill-
System Flush can be used on all spa and whirlpool surfaces. Removes oily residues and deposits quickly and easily
When it's time to change your spa water, first REMOVE filter, adjust water level if necessary, but DO NOT DRAIN.
Add System Flush for Spas directly into old spa water: add 1/2 bottle for 400 gallons of spa water (4 tablespoons per 100 gallons}.
Run spa at high speed with all jets and water features for 15 - 30 minutes, or overnight at low speed (if convenient}.
Drain water, clean spa shell. Use a small amount of System Flush for Spas on sponge or terrycloth to wipe residues.
Reinstall clean filter, refill, and balance spa water.
Repeat with every water change.