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Banish | 23500BIO

Banish | 23500BIO

Regular price $39.17 USD
Regular price $39.17 USD Sale price $39.17 USD
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BioGuard Banish kills ALL types of swimming pool algae. This fast acting formula will produce results in just 24 hours. This product allows swimmers to return soon after treatment. It is formulated to clear up water while it kills the algae and is approved for use in chlorine and bromine pools. Banish does not affect pH levels, so no readjusting is necessary after application. This product is also approved for use during shock treatments, so there are fewer steps than when using other copper-based algaecides.


Prior to Application:

  1. Ensure that all equipment is functioning properly. Clean the filter system if needed.
  2. Adjust the pH of the pool water to a range of 7.2-7.6.
  3. Establish a minimum stabilizer level of 30-40 ppm in chlorinated pools.
  4. Vacuum any leaves and foreign debris from the pool.
  5. If metal testing indicates the need for a stain and scale inhibitor, follow the directions on the product label.
  6. Thoroughly brush visible algae from the pool's surface using a brush compatible with the pool surface.
  7. Maintain proper chlorine or bromine levels in the pool.

To Prevent Pool Algae:

  1. Initial Application: Add 8 ounces of this product per 10,000 gallons of pool water while the pump and filter are operating.
  2. Weekly Application: Add 1.5 ounces per 10,000 gallons of pool water at weekly intervals.
  3. Bi-Weekly Application: Add 3 fluid ounces per 10,000 gallons of pool water every other week.
  4. Adjust application frequency as needed based on factors such as heavy rain, frequent backwashing, or partial drain/refill.
  5. Wait at least 15 minutes after application before entering the pool.

Treatment of Visible Algae:

  1. Add 1 pound of BioGuard Maintain BurnOut 3 per 10,000 gallons of pool water or follow the application directions on the BurnOut 35 or BioGuard Smart Shock products based on your pool water volume.
  2. Allow the product to circulate for 1 hour.
  3. With the pump and filter operating, directly apply 16 ounces of this product per 10,000 gallons of pool water to the areas with the heaviest algae growth.
  4. Continuously circulate the pool water for 24 hours.
  5. The next day, thoroughly brush the pool surface.
  6. Before re-entering the pool, test the chlorine level. Do not enter the pool until the chlorine level is between 1-4 ppm.
  7. For persistent algae cases, repeat the brushing and product application after 2-4 days.
  8. Using a filter aid will enhance filter efficiency and help with algae removal.
  9. Chemically cleaning the filter is recommend 3 to 4 days after treatment.



1.5 oz per 10,000 gallons of water per week, or 3 oz per 10,000 gallons of water every other week.

Algae Removal:

16 fl oz per 10,000 gallons of water.


Copper (metallic): 3.3%
Other Ingredients: 96.7%

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