Aim to maintain a chlorine level of 3 to 5mg/l at all times. How frequently you add more chlorine will depend on your usage and bathing habits. It could be daily, every two to three days or weekly. For 1mg/l, add 2g per 1000 litres.
To raise spa's water by 1 ppm (using chlorine or bromine granules) Add 2 grams 220 gallons ( 1,000 litres) To ensure the ideal reading of 3 – 5 ppm is maintained it is advised to aim for 5 ppm to provide a useful “buffer” for fluctuating conditions such as bathing loads and hot weather.
2g of Chlorine Granules will increase the chlorine level of 1,000 litres of water by 1mg/l (ppm). If you are pre- dissolving your granules in a bucket of water you can follow this formula up to a maximum rate of 10g Chlorine to 1 litre of water. To be accurate you will need to know the volume of water in your hot tub.
In general, 2 teaspoons of chlorine per 200 gallons diluted in water and poured into a circulating tub will generally help raise chlorine levels quite quickly without overdoing it. You should test your chlorine levels every few days and adjust as needed.
In the heat of summer your pool can require 4 grams of chlorine per cubic meter of water (1000 litres) of water every day.
Setting Up A Hot Tub
This can be done by adding 60g of chlorine granules per 1,500 litres of water to start the sanitation process and allow the level to drop to 3-5mg/l before using the hot tub.
Calculate how much chlorine (sodium dichlor) you need. The goal of shocking is to temporarily increase the free chlorine level to 10 ppm. Shocking a hot tub requires about 2 ounces (4 tablespoons)of chlorine for every 500 gallons of water.
With the popularity of hot tubs on the rise, it's becoming more common for our customers to question their increase in water usage. An average 4 seater hot tub holds about 1,250 litres of water, while a larger 7 seater hot tub will hold around 3,000 litres.
Measure 17g of non-chlorine shock per 1500 litres or 35g of chlorine shock per 1500 litres (consult the label instructions as this can vary based on chemical quality and brand). Carefully add the required shock to the hot tub. Leave the cover off for approximately 20 minutes.
Chemicals in your hot tub water can be a delicate balance. So it's crucial to maintain the levels of pH, Alkalinity, and Chlorine or Bromine, also known as sanitizers. You should wait 12 hours before entering the hot tub when you've added either chlorine or bromine to allow it to take effect properly.
If theres too much chlorine it will vaporise and form gas that floats just above the surface of the water. If this vapor is inhaled it can inflame airways and exacerbate certain breathing conditions. Read more What Temperature Should My Spa Pool be at and Why?
How Many Chlorine Tablets? For smaller hot tubs we recommend 1-3 tablets and for larger hot tubs 3-5 tablets. Unfortunately this question doesn't have one simple answer and it depends on lots of factors like water flow, usage and hot tub size. Test your water regulary after start-up and see how the levels are sitting.
For every 500 gallons of water, you need to add 4 tablespoons (or 2 ounces) of chlorine. However, we advise waiting for the chlorine levels to come down to 3 to 5 ppm before using the hot tub.
Regular hot tub shocking is inevitable to keep your water clean and safe for use. Dead skin and other elements like hair may end up dropping in the hot tub, leaving the tub in a mess. It is essential to shock the hot tub frequently – at least once every week.
If the value is between 7.8 and 8.0 then add 30g for a 6 person spa (1,000L) or 24g to a 4 person spa (800L). To do this add the granules to 2L of warm water & distribute the solution around the spa whilst the pumps are turned on.
To dose water in a tank with 5 mg/L chlorine use: 40 millilitres of liquid pool chlorine or 170 millilitres of bleach, for every 1000 litres in the tank. Always test the residual chlorine level with a chlorine test strip.
If the water is clean and clear, then add about 3 oz of liquid chlorine per 1000 gallons of water – while the pool filter is running. This should give you a chlorine level of about 3 ppm.
A floater is really the worst way to take care of sanitizing your tub—about the most “dinosaur” method still used. It's difficult to regulate the amount of sanitizer being dissolved into the body of water. Then, it starts to seek out what it wants to “eat” after bacteria is gone: pH, tub shell, and more.
The chemicals you will need to start your hot tub include a pH increaser, pH decreaser, calcium hardness, a metal removal (if using water from rainwater tanks or bore) and a sanitiser.
Chlorine – The most popular hot tub sanitiser, chlorine is fast acting and effective at killing bacteria. Our chlorine hot tub maintenance guide explains more about how chlorine works. Bromine – Ideal for those with sensitive skin, bromine reacts slower than chlorine and is effective at killing bacteria.
65% - You will need 16g by weight or 15ml by volume of cal-hypo 65% to raise your pool chlorine levels by 1PPM per 10,000 liters of water. 75% - You will need 14g by weight or 13ml by volume of cal-hypo 73% to raise your pool chlorine levels by 1PPM per 10,000 liters of water.
For example: if you had a 3000 litre tank then you would look on the table and take the bleach quantity for 2000 litres plus the quantity for 1000 litres (which is 133 mLs and 67 mLs) - adding those two quantities of bleach together gives a total of 200mLs of bleach needed to treat the 3000 litre tank.
Quantity of water in the tank (in liters) = 785 x (Tank Diameter in meter)2 x (Height of water column) – All measurement in Meters. Quantity of bleaching power required: If the Bleaching powder contains 30% or more chlorine, then 5 gm Bleaching powder is required for proper disinfection of 1000 lits of water.