Welcome to Sun Salt Services

Sun Salt produces quality salt and salt products for the industrial, agricultural and household markets in South Africa.

Sun Salt Services, under the holding company Salt Refiners and Packers Holding (Pty) Ltd, produces in excess of 100,000 tons of salt per year.

Just purchased our Pool Salt?

Here are the instructions for using the pool salt in your pool.

Pool Salt Application Instructions:

OPTIMUM / IDEAL POOL WATER CONDITIONS

Free Chlorine:

  • 2.0 – 3.0 PPM
  • Above 3.0 PPM may cause corrosion of pool metals.

pH:

  • 7.2 – 7.6
  • Use Hydrochloric Acid to lower pH and soda ash to raise pH. In a fibreglass pool, use alkalinity to raise pH.

Chlorine Stabiliser:

  • 50 – 75 PPM

Total Alkalinity:

  • 80 – 120 PPM

Calcium Hardness:

  • 150 – 250 PPM

Metals (Copper, Iron, Manganese):

  • None.

Nitrates:

  • None.

WHAT TYPE OF SALT TO USE

  • The purer the salt, the better the life and performance of the electrolytic cell. Use a salt that is >99 pure NACL (Sodium Chloride).
  • Avoid using salt with anti-caking or free flowing agents. Do not use iodated salt.
  • Do not use Calcium Chloride / Potassium Chloride as a source of salt (use Sodium Chloride only).
  • Do not use salt intended for agricultural use. The insoluble impurities mixed with the salt can shorten the life of the cells.

HOW MUCH SALT TO USE

  • 4000 to 6000 PPM depending on the chlorinator make and design. 4 – 6 kgs per m3 of volume.
  • Low salt concentration below 2000 PPM will render the system ineffective as the salt concentration is too weak.
  • High salt chlorination above 6000 PPM may cause corrosion to pool fixtures.
POOL SIZE IN LITRES: 30,000 LTS 40,000 LTS 50,000 LTS 75,000 LTS 100,000 LTS 120,000 LTS
KGS OF SALT NEEDED FOR 4000 PPM 120 KGS 160 KGS 200 KGS 300 KGS 400 KGS 480 KGS
KGS OF SALT NEEDED FOR 5000 PPM 150 KGS 200 KGS 250 KGS 375 KGS 500 KGS 600 KGS
KGS OF SALT NEEDED FOR 6000 PPM 180 KGS 240 KGS 300 KGS 450 KGS 600 KGS 720 KGS

DETERMINING POOL SIZE

Rectangular or Square Pool:

  • Volume = Length x Breadth x Depth

Circular Pool:

  • Volume = (πR2) x Depth

Oval Pool with Straight Sides:

  • Volume = (πR2)D + (2R x H)D

CAUSES OF STAINING

The most common causes of staining include:

  • Prolonged use of copper-based pool products, including certain algaecides.
  • Dissolved metals (usually iron, copper or manganese) in the water.
  • Organic stains caused by algae or disintegrated plant debris.
  • The use of borehole water in the pool.
  • Incorrect pH levels.
  • Incorrect total alkalinity (TA) levels.

IDENTIFYING AND TREATING STAINS

Iron and Manganese Stains:

While iron stains are generally yellow-brown, manganese stains are a darker brown-black colour. Both are usually caused by the use of borehole water with a fairly high metal content. They may also occur if the pH and/or TA levels are consistently low over a long period of time.

Copper Stains:

Since copper may be used as an algaecide, many people use copper-based products in their swimming pools. Blue-black in colour, copper stains result from the extensive use of copper sulphate, copper ionisers in the water or from copper-based algaecides. If the pH and/or TA levels are not correct, the staining process will be accelerated.

Algae and Decaying Plant Debris:

If a pool has been neglected and algae has been left to grow on the pool walls, it is likely to leave a grey stain after it is removed. Decayed leaves (which contain tannin) and other debris tend to leave a slimy brown stain.

Low pH or TA:

The first hint that the pH or TA is low will be slightly green water. If left, it will turn dark green within days as it corrodes metal in the pool.

High pH or TA:

This usually indicates that the balance of the pool water has exceeded its saturation level. This results in precipitation and scaling.