Sodium bicarbonate 4 Kg
Baking soda, also known as sodium bicarbonate is naturally alkaline, with a pH of 8. When you add baking soda to your pool water, you will raise both the pH and the alkalinity, improving stability and clarity. Many commercial pool products for raising alkalinity utilize baking soda as their main active ingredient.
Raising Low Total Alkalinity
Sodium bicarbonate (bicarbonate of soda), NaHCO3, will raise the total alkalinity without excessively raising the pH. You should try to increase the total alkalinity over a period of time, adding a maximum of 500 gr of bicarb for every 22,000 litres (22m3) of water every 4 days. When the TA is too high, the following can occur:
pH keeps going up despite regular addition of pH-Minus or hydrochloric (muriatic) acid
burning eyes and itchy skin
reduced chlorine efficiency resulting in algae growth
Note: Do not add more than 4 Litres of Pool Acid per 40,000 Litres of water at one time. If the pool requires more than this, add the maximum amount then retest 12 hours later and make further adjustments.