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Backwash Reduction and Improved Filtration

Ensuring that water quality is at the highest level is an ongoing battle for operators of pools of any size, from Olympic pools and water parks to household spas. In any pool the two main challenges are maintaining efficient filtration of the water, and keeping the bacterial count low without adding too much chlorine.

HydroFLOW uses non-chemical flocculation to help existing filters work more effectively. The water becomes clearer, and the filter itself becomes easier to clean. This means that the amount of water wasted on backwashing – and the energy and chemicals used to heat and treat it – can be dramatically reduced. Reductions in the total amount of backwashing commonly reach 66%, and the savings on water, sewage and chemical charges can be huge. Additionally, as chloramine levels are lowered, the “Swimming Pool Smell” and eye irritation is also reduced.

The pool shown below is a 500 cubic meter outdoor pool. Before treatment with HydroFLOW, they were using 34.3 kg of chlorine/ day and 4.3 kg of acid. They were backwashing an average of 1.5 times per week, equivalent to 18 cubic meters per week.

The pool was treated with HydroFLOW for a trial period of 6 weeks. Over this time, the chlorine used was reduced by approximately 47% and the acid used was reduced by around 70%. Backwashing frequency was reduced to an average of 0.5 times per week, corresponding to a 66% reduction in the amount of backwash water. The drop in backwash water volume and chemical use had a knock-on effect of making the maintenance of the pool easier and more convenient.

Trial Results

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Approx 47% reduction in chlorine

66% reduction in backwash water


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