Most spa owners change their hot tub’s water every 2 to 4 months. This is primarily because over time, salt from perspiration and other non-organic contaminants—the Total Dissolved Solids or TDS, will increase to levels causing cloudiness or other problems. Knowing when to drain and refill is important.
Although organics are destroyed by sanitiser systems, TDS levels continue to increase over time. But how do you really know when it’s time for draining? Maintaining spa water balance & sanitiser, along with proper filtration will maximize the time between water changes. It’s time to change the water when the TDS level reads between 1000 – 1500 PPM. These levels can be checked by the Professional pool & spa chemical retailers.
1. Changing Water - Draining intervals for Hot Tub Spas
Once a phenomena of the Northern Hemisphere, phosphates are currently Australia biggest issue. This Bulletin looks at how to handle the latest enemy of Pool & Spa Owners.
Phosphates are a natural result of pollution. They are airborne and are transferred into pool & spa water carried by wind, leaves, dust, on bathers and through grass and other matter carried in/on feet or in the water source (particularly tank water).
Phosphate is the favourite food source for algae. Algae enjoy warmth, moisture and a staple diet of phosphate.
9. Poppits Start-Up and Maintenance Cards and Program
pH – The measure of acidity or alkaline levels in your swimming pool water. Adding too much acid causes the pH to drop and become acidic. Acidic pool water (pH less than 7) is corrosive and can damage pool surfaces and metal fixtures and also cause stinging eyes and skin irritations. Water with a high pH (above 7.8) can cause scale to form on pool surfaces and create cloudy water, dry skin and eye discomfort.
Total Alkalinity (TA) – The measure of the dissolved alkaline level in your swimming pool water. The TA measures the resistance of the pool water to changes in pH. For example, if the Total Alkalinity is low then the addition of acid can lower the pH sharply and damage the pool surface and equipment. The higher the TA, the less pH fluctuates.
Calcium Hardness – The amount of calcium in the swimming pool water. This is used to protect pool surfaces in soft water areas.
Stabilizer – This is used as a UV protection to hold chlorine levels in pool water for longer periods of time. Acting similarly as a sunscreen for your pool water.
Shock Dosing – This is recommended to be done as it will oxidise (burn off) and chemically break up any contaminants in pool water.
Total Dissolved Solids (TDS) – The measure of total dissolved solids in pool water. TDS can be made up of salts, minerals, metals and any unfiltered oxidised material.
Pools installed with an ionic sterilizer require a lower TDS level (<800ppm). On the other hand salt chlorinated pools run on a much higher level (3000 –6000ppm). Check with your preferred pool or spa supplier to determine the correct level for your pool.
Sanitizers – These are critical to controlling harmful bacteria in swimming and spa pools. Use only registered sanitizers/bactericides and always at prescribed levels to protect your pool and those who bath in it.
Algicide – This is used to kill, control and prevent algae forming in pool water.
An explanation of the mode of action for hydrogen peroxide in Spa & Spa Pool water.
Since chlorine is and has been the standard sanitiser for pool & spa water, and some people do not associate hydrogen peroxide as a sanitiser, it may be useful to understand the mode of action of Hydrogen peroxide.