NoPhos may be added by hand to the balancing flow tank or pool at the end of the day after the public have left the pool. Can be added in daily or weekly quantities. If the product is added once a week, it is best added to the water after a filter back-wash. The mains tap water can contain high levels of phosphate, NoPhos should therefore be used when ever a large quantity of mains water is introduced to the system. System | Application Rates powder NoPhos | | | Amount of NoPhos required per week, per cubic meter of water in the pool
| | Private swimming pool | 0.5g to 1.0g per week | | Public swimming pool | 1g to 2 g per week | | Public Spa | 2 to 5 g per week |
Example calculation 1. private pool Private pool, with a water volume of 50 cubic meters = 11,000 gallons NoPhos application rate = 0.5 g to 1.0 g of NoPhos per cubic metre of water per week, => 0.5 x 50 to 1.0 x 50 Amount of NoPhos required per week = 25g to 50g ( or 50 to 100ml of NoPhos concentrate) Example Calculation 2. public pool Public pool with a water volume of 500 cubic meters NoPhos application rate = 1g to 2g of NoPhos per cubic metre of water per week, => 1 x 500 to 2 x 500 Amount of NoPhos required per week = 500g to 1000g ( or 1 to 2 litres of NoPhos concentrate) Automatic dosing For best results NoPhos should be dosed continuously into the water prior to the AFM or sand filters. Dissolve 1 Kg pack of NoPhos (or 2 litres of NoPhos concentrate) into 20 litres of water and use a peristaltic pump to continuously dose into the pipe work before the sand or AFM filters. Larger quantities or stronger concentrations may be prepared, and the dose rate adjusted accordingly. For best results you should use a Dryden Aqua ZPM (Zeta Potential Mixer). The ZPM unit simply flanges into the the pipework between the AFM / sand filter and the pump. The NoPhos is then dosed into the pipe-work between the ZPM unit and the pump. To make Nophos stock solution for automatic dosing at 1 kg of NoPhos crystals to 20 litres of water, or 2 litres of NoPhos concentrate to 20 litres of water in a sutable carbout of tank. The dosing rate for the diluted NoPhos solution is as follows | System | Application Rates for diluted NoPhos solution
1 kg (or 2 litres of concentrate) of Nophos dissolved in 20 litres of clean water, is dosed into the pool water at the following rates | | | Amount of NoPhos require in ml per cubic metre of water passed through the AFM or sand filters | | private pool | 0.5 to 1 ml | | public pool | 0.5 to 1 ml | | public Spa | 2.0 to 5.0 ml |
Example calculation 1. private pool Private pool with a water volume of 50 cubm and filtration rate of 10 cubm/hr through the filters NoPhos application rate = 0.5ml to 1.0ml of NoPhos per cubic metre of water filter per hour => 0.5 x 10 to 1.0 x 10 => 5ml to 10ml per hour Dosing accurately such a small quantities of solution can be a problem, if you wish to increase the dose rate you may need to dilute the stock solution, so instead of adding 1 kg of NoPhos Crystals or 2 litres of NoPhos concentrate, to 20 litres of clean water, you only at 100g of NoPhos crystals or 200ml of NoPhos concentrate, to 20 litres of clean water, and then dose at a rate of 50ml hr to 100 ml/hr, this can make it much easier to dose, but you will now go through the stock solution very 1 to 2 weeks. You may use a different dilution factor to give you the time interval desired. Example Calculation 2. public pool Public pool with a water volume of 500 cubic meters, and filtration rate of 120 cubm/hr NoPhos application rate = 1ml to 2ml of NoPhos per cubic metre of water per week, => 1 x 120 to 2 x 120 = 120ml/hr to 240 ml/hr 
| 
homepage | Applications for AFM |
