• $ 42.99

  • Our premium formula, highly effective, kills ALL types of algae
  • Fast-acting, non-foaming, producing results in 24 hours
  • Use in chlorine or bromine pools with all surfaces or filter types


  • Fast acting on all types of algae
  • Multi functional formula clears water
  • Compatible with chlorine, bromine, Mineral Springs® and saltwater systems
  • Do not use in SoftSwim® or other biguanide sysetms
  • 3.3% copper


  • Patented non-staining pool algicide
  • Kills and prevents green, mustard, and black algae
  • Results in 24 hours
  • Non-foaming
  • For all pool types

What it does

BioGuard® Banish® algicide when used directed, is a highly effective, patented, non-staining algicide that kills and controls algae in swimming pools. It is especially recommended for killing and controlling green, blue-green (frequently called black or spot algae) and mustard algae growths. Banish® algicide can be used as a remedy for visible algae or to prevent algae from occurring. Banish® is formulated for use in chlorine or bromine sanitized swimming pools of all surface and filter types.


Directions for Use

Prior to Application

  1. Ensure all equipment is working properly. If necessary, clean the filter system.
  2. Balance water according to our ALEX® Pro test recommendations or by using the BioGuard 5-way Test Strips.
  3. Vacuum leaves and any other foreign debris from pool.
  4. Brush visible algae thoroughly from the pool’s surface with a surface-compatible brush.

To Prevent Pool Algae

  1. Initially apply 8 fl oz of this product per 10,000 gallons of pool water with pump and filter operating.
  2. Thereafter, for weekly application intervals, add 1.5 fl oz per 10,000 gallons of pool water. For two week application intervals, add 3 fl oz per 10,000 gallons of pool water every other week. Apply more often if pool volume is diluted by heavy rain, frequent backwashing or partial drain/refill.
  3. Wait at least 15 minutes after application before entering pool.

Treatment of Visible Pool Algae

  1. Add 1 lb of BurnOut® 3 per 10,000 gallons of pool water or 1 lb of Smart Shock® per 12,000 gallons of pool water. Follow application directions on these products.
  2. Allow to circulate for 1 hour.
  3. With pump and filter operating, apply 16 oz. of Banish® per 10,000 gallons in areas of heaviest algae growth.
  4. Circulate for 24 hours.
  5. The next day, thoroughly brush pool surfaces.
  6. Prior to re-entry, test chlorine level. Do not enter pool until chlorine level is between 1-4 ppm.
  7. In cases of persistent algae, repeat brushing and product application after 2-4 days.
  8. The use of Sparkle Up® will enhance filter efficiency and algae removal.
  9. After completing algae treatment, clean the filter with Strip Kwik® .


NOTE: Avoid physical contact with product. Follow safety information on label instructions. Store in a cool, dry place. Keep out of the reach of children.

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