The above dosages are just a guide and your pool could require more or less.  Pools with higher total alkalinities and TDS could require more.  Add slowly in increments, in front of a moving return flow.  Remember you can always add more  - you can't take out!  Go to the Chemical Safety Practices page, for more about proper procedures and handling.  Larger or smaller pools or spas, use proportionate amounts.

The above dosages are just a guide and your pool could require more or less.  Pools with higher total alkalinities and TDS could require more.  Add slowly in increments, in front of a moving return flow.  Always add the acid to the pool water.  Go to the Chemical Safety Practices page, for more about proper procedures and handling.   Larger or smaller pools or spas, use proportionate amounts.

The above dosages are just a guide and your pool could require more or less.  Add slowly in increments, in front of a moving return flow.  To obtain a truer TA reading, subtract 30% of the Cyanuric Acid reading from the TA reading.  Remember you can always add more - you can't take out!  Go to the Chemical Safety Practices page, for more about proper procedures and handling.   Larger or smaller pools, use proportionate amounts.

The above dosages are just a guide and your pool could require more or less.  Add slowly in increments, in front of a moving return flow.  To obtain a truer TA reading, subtract 30% of the Cyanuric Acid reading from the TA reading.   Remember you can always add more - you can't take out!  Go to the Chemical Safety Practices page, for more about proper procedures and handling.   Larger or smaller pools or spas, use proportionate amounts.  Your pool or spa could require more. or less, based on the overall sanitizing method.

The above dosages are just a guide and your pool could require more or less.  Add slowly in increments, in front of a moving return flow or by broadcasting across the surface.  Vinyl and Fiberglass pools can do well with lower levels, as their walls are not made of masonry materials.  Gunite pools should maintain a higher level, to help protect the walls and minimize the tendency of the pH to rise, as calcium dissolves from the plastered surface.  High pH and/or TA make cloudy water more likely, as this chemical is added.  Larger or smaller pools, use proportionate amounts.  Lowering Calcium Hardness can be done, by replacing some of the water with softer water.  Adding 1 pound of Tri Sodium Phosphate (TSP), per 10,000 gallons of pool water, will drop the calcium harness by 11 PPM.  However, this will cause cloudiness, a major amount of cleaning of the pool and filter and the possibility that any lingering phosphates will promote algae growth.  Calcium sequestering agent are another choice for dealing with high calcium levels.  Go to the Chemical Safety Practices page, for more about proper procedures and handling.  Larger or smaller pools or spas, use proportionate amounts.  Your pool or spa could require more. or less, based on the overall sanitizing method.

The above dosages are just a guide and your pool should require these amounts, providing the testing was reasonably accurate.  Add slowly in increments, in front of a moving return flow or by broadcasting across the surface.  Adding it very slowly, to the skimmer, is another way to add this slowly dissolving chemical.  Pools that use Trichlor or Dichlor will find that their cyanuric acid levels will rise over time.  If trichlor is used as the primary sanitizer, dichlor as a shock should be avoided, as it will only speed up the rise of the cyanuric acid level.   Water replacement is the only means of lowering a high level.  Go to the Chemical Safety Practices page, for more about proper procedures and handling.  Larger or smaller pools or spas, use proportionate amounts.  THIS CHEMICAL IS NOT REQUIRED IN SPAS THAT ARE COVERED, MOST OF THE TIME.

Superchlorination is used to help destroy algae, restore water quality and to eliminate the odorous and irritating forms of chlorine.  Boosting the free chlorine to 10 PPM, will destroy 1.0 PPM of combined chlorine.  Combined chlorine is the difference between the Total Chlorine reading and the Free Chlorine reading.  Test values under 0.3 PPM are indicative of good chlorine management.  Reading between 0.3 and 1.0 PPM, indicate that more attention may need to be directed to the chlorine application rate.  Readings over 1.0 PPM are likely to result in eye irritation and odorous conditions.  Go to the Chemical Safety Practices page, for more about proper procedures and handling.   Larger or smaller pools, use proportionate amounts.  Your pool or spa could require more. or less, based on the overall sanitizing method.

Total Dissolved Solids (TDS) has to be separated into two categories.  TDS that results from naturally occurring mineral salts, build up of chemical residues and waste from bathers.  What is present in the source water may not be controllable and pool or spa usage will add to the TDS level.  As this level rises to 2000-3000 PPM, the possibility exists that it will affect water clarity, scaling and sanitizer performance.  Depending on the nature of the available replacement water, it may be difficult to drastically lower the level.  High TDS that results, from the addition of the required amount of salt when a salt chlorine generator is used, presents a different problem.  2500-4000 PPM of salt may have to be added, depending on the manufacturer's recommendation, and does not present the same issues, unless the water was high in TDS before the salt was added.  If that is the case, clarity, scaling and corrosion issues could present themselves.   Addition of sequestering agents could help minimize problems and help keep the salt cell free of scale.  Go to the Chemical Safety Practices page, for more about proper procedures and handling.