Pools goes cloudy or green.
Causes: Often caused by a high pH or under-sanitation, which results in Algae Growth.
Remedy: Correct the pH to read between 7,2 – 7,6 with Pool Acid or Alkalinity shock dose with 4 – 6 cups of Chlorine.
Add 1,5 litres TwoTen Algaecide the following morning.
Pool turns Brownish Colour when chlorine is added.
Causes: Low pH and when Chlorine is added it reacts with the water causing the iron in the water, which is normally resent but cannot be seen, to come out of solution and become visible. This can also cause bad brown stains on walls and floor.
Remedy: Lower chlorine lever (withdraw chlorine treatment until the Chlorine lever measures below 0,5ppm) and add 1,5 litre TwoTen Metal Marvel. This removes the iron from the water by precipitation. Correct the pH, then vacuum to remove the resulted brown dust from the pool floor.
Algae growing on the walls and floor of the pool.
Causes: Hot days with high humidity or thunderstorms, also under-sanitation and insufficient brushing.
Remedy: Brush vigorously. Thereafter, add a bottle of TwoTen Algaecide in the morning. Shock dose in the late afternoon with 4 times the normal recommended dose of Chlorine and brush again.
Mustard/green colour algae suddenly appears on the pool wall.
Causes: Usually insufficient sanitation.
Remedy: Correct pH. Brush the algae off the walls. Add on bottle to TwoTen Algaecide following instructions on the bottle. Then shock dose with Chlorine in the late afternoon and brush once more.
Black algae spots appear mostly in the shady side of the deep end.
Causes: Under-sanitation and general neglect of pH testing and brushing.
Remedy: Brush vigorously with a stiff or Stainless Steel Brush in on marbelite surface or with a very hard polyprop Algae Brush if on a painted surface. Add a bottle of TwoTen Algaecide carefully following instructions. Shock dose with chlorine for next 2 days in the late afternoon approximately 3 cups at a time. Ensure correct pH prior to any chemical treatment.
Pool smells of Chlorine and shows a correct Chlorine reading on the test kit but is green or cloudy.
Causes: Build-up of chloramines, which are the waste products of spent Chlorine and that have the classic chlorine smell.
Remedy: Shock dose with about 3 – 5 times normal recommended dose of TwoTen Chlorine.
pH and Chlorine readings are correct. Water is blue but remains cloudy.
Causes: Fine matter in suspension in the water – too small to be trapped in the sand filer.
Remedy: Backwash filer and the pour 200ml TwoTen Water Clarifier into the weir of the pool. The flocculent will coagulate the small particles, which in turn will be trapped in the sand.
Contact with water causes eyes to burn.
Causes: Normally caused if the pH of pool water is too low (acidic).
Remedy: Add Soda Ash or Alkalinity Booster in small doses, i.e. 500 grams at a time until the pH reading is between 7,2 and 7,6.
The pressure of the water flowing into the pool drops appreciably and the reading on the pressure gauge of the filer is either (1) high or (2) very low.
Causes: (1) if the reading is high then the filter is clogged and needs backwashing (2) if low, then the weir or pump baskets are clogged with leaves or debris.
Remedy: (1) backwash filer (2) switch off motor and clear pump and weir basket of all debris.
A dark ring of dirt appears on the mosaic tiles at water level.
Causes: Body oils, suntan lotion, etc.
Remedy: Use Hydrochloric Pool Acid diluted 5 parts water to 1 part Acid to remove this dirt. Protect hands and eyes during this Operation.
Stains or marks on marble or plaster surface.
Causes: Metal objects, i.e. coins, hairclips, etc or leaves, fruit, etc.
Remedy: Most small stains or marks can be removed by using an Emery Sander or a Stainless Steel Brush . If marks are large and persist, then the pool must be emptied and acid washed (using Hydrochloric Acid ) or sanded with an electric sander.
pH too low
Causes: Too much acid or acidic compounds have been added.
Remedy: AddSoda Ash (see dosage table page 8 for correct dose).
pH Test erratic , not working properly
Causes: Phenol solution has been left in sunlight and turned yellow or is old.
Remedy: Replace solution. This solution should be replaced every 3 months.
Chlorine test water remains clear.
Causes: There is no chlorine in the pool.
Remedy: Remember to always test for Chlorine in the morning before 8:30am. The sun will start to dissipate Chlorine after this time. if the Chlorine level is still too low then increase the dose that is being added each day
Dust remains in the suspension in the water
Causes: Usually as a result of wind or heavy rainstorms.
Remedy: Use Aluminium Sulphate powder. Approximately 2kg per 50000 litres. Broadcast the powder across the surface of the water with the filter off. Leave overnight. The Alum Powder will settle to dust on the pool floor. Vacuum to waste the next day.
