Questions and Answers

Q. “Can I Keep last year’s pool water or does the pool need to be emptied and refilled?”

A. In most cases it is possible to use the same water for a number of years.
Effective backwash & rinse procedures are multifunctional. You are removing the heavier debris from the filter, and you are replenishing the water in your pool. The only time pool water would need to be replaced in its entirety is if properties such as Total Dissolved Solids and Metals in your water reached levels which prevent the chlorine from working effectively and the water is constantly discoloured or cloudy.
Taking a water sample to your BioGuard® Dealer will pay dividends, because through their easy preventative approach to pool care, problems such as these will be detected and dealt with as necessary.

Q. “How can I prevent my pool from turning green?”

A. BioGuard’s systematic approach to pool care, through our 3-Step programme or SynergyTM System, are designed to make pool water management simple, economical and less time-consuming. By using our systems the likelihood of your pool turning green is greatly reduced. Step number 1 below is applicable.

Q. “How can I recover my pool should the water turn green?”

A. In the majority of cases, most pools have the green effect due to presence of algae, although metals can also be the cause. Assuming algae is the cause and chlorine is the sanitiser, the following procedure should recover the pool quickly:

  1. Check that the filter media is clean and in good condition. If there is any doubt as to the efficiency of the sand or filtration, circulation system. Consult your BioGuard® Pool Professional. (A deep cleanse with BioGuard® Strip Kwik® could do the trick.)
  2. Ensure pH is between 7.4 and 7.6 and that pool floor, skimmers & baskets are free of leaves and other debris.
  3. Add BioGuard® Burn Out® at a rate of 3 Bags per 45,000l in the evening.
  4. Add BioGuard® Algae Killer at a rate of 1 lt per 40,000l / or MSAII at a rate of 1l per 100,000l and allow to circulate for at least one hour.
  5. If the algae problem persists consult your BioGuard® Dealer.

Q. “How often should filter sand be changed?”

A. Silica sand is used in sand filters and is very hard wearing and the life is not as much dependent on the breakdown of the sand but more due to the buildup of trapped debris on the sand particle. A regular (annual) chemical clean of the sand will prevent the buildup of oils, greases, scale and general debris. The best way of gauging whether the sand is due for replacement is by monitoring the filter pressure. Should the pressure remain in the red even after an effective backwash procedure the chances are that the sand needs to be replaced.

Q. “How do I calculate the volume of my pool?”

A. The calculation is as follows: Length(m) x Breadth(m) x Average Depth(m) x 1000 in litres. (Rectangular Pool)

Q. “What is pH and why is it so important?”

A. In simple terms pH is a measure of how acidic or alkaline the pool water is. The pH range can be applied to any liquid and is a logarithmic scale of 0 to 14. Ie. A pH of 6.5 is 10 times more acidic than a pH of 7.5, whereas a pH of 5.5 is one hundred times more acidic than a pH of 7.5. The same applies to the reverse side of the scale. The comfort of the water and the effectiveness of the chlorine is governed by pH. Refer to water balance for more information.