ultraDirections for use:

(Based on a 50 000l pool)

Use only as directed.



  1. Maintain pH between 7.2-7.6 in Marbelite pools or 7.0-7.2 in Fibreglass pools
  2. Test and correct weekly
  3. If pH is < 7.2, add HTH® Soda Ash
  4. If pH is > 7.6, add HTH® Easy Acid



With pump running on filter setting

Add 1 cup (250g) 50 000liters around the sides of the pool in the early evening

Daily or every 2nd day (maintain 1 -3ppm free chlorine)

NB: In case of vinyl or colored pool lining, add HTH® Ultra directly into the weir to prevent bleaching.



To treat algae, discolored water or due to extreme conditions ( i.e., extreme weather, high bather load, etc)

With the pump on the filter setting Add 3xnormal dose of HTH® Ultra or 1 sachet of HTH® Shock It

Test and correct pH after 12 hours. Only enter pool water when chlorine level is <3ppm

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