What Pool and Hot Tub Owners Must Know About Water Clarifiers

Most pools and hot tubs built within the last 25 years are more than likely capable of keeping your pool or hot tub water crystal clear.

The improvements in various filtration designs, newer media and extremely efficient, performance-driven circulating pumps have had a tremendously positive impact on water clarity without the need for additional chemicals, such as water clarifiers.

However, if you have a chronic cloudy pool or hot tub, fear not–there are a few things you can do to put the sparkle back into your water.

Check your filter if it needs servicing:

Regardless of the pool filter media; be it Diatomaceous Earth (DE), Hi-Rate Sand or Cartridge-type system, it may require thorough cleaning and servicing. DE filters and cartridge-type filters require periodic disassembling and detailed chemical cleaning.

  • Sand types need occasional sand media replacement to ensure clean and clear water. Consult the owner’s manual of your filter.

Run your filter-circulating pump for a specific length of time each day:

Your filter pump needs to operate as many hours a day as it takes to filter the entire pool volume at least once a day. Hot tubs often have pre-programmed time sequences built in to the firmware, enabling several turnovers of the entire volume of water.

As a rule of thumb, set the pump timer of your swimming pool to run at least one hour per 10° of ambient or water temperature a day. For example, if your pool is 80°, you should set it to operate eight hours a day.

Shock your pool or hot tub:

It helps maintain water clarity due to organic matter buildup.

Add polymeric water clarifiers as needed:

A polymeric clarifier works like a magnet. It attracts and gathers (a.k.a. agglomerates) negatively charged particles (like dirt, dusts and other inorganic particles), making them large enough to become trapped in the media of the filter.

  • Most clarifiers are selective to a degree in what the polymers will and will not attract. Some may be formulated with actual crab shells, thus making them “green” products, and some may actually be added to a fish pond or bird bath.

In order to decide how to best apply these clarifiers, be sure to read and follow the directions on the container.

  • A clarifier can also be used to “polish” the water. For example, the pool may look really clear during the day but when the pool light illuminates the water at night, you may see tiny particles in suspension, which may even appear as effervescing like a soda drink. More than likely they’re dirt or dust particles.
  • A good quality polymeric or a clarifier formulated with crab shells will gather and remove these particles via the filter, making your water sparkle again.

Hot tubs may benefit from the use of an approved water clarifier every week as there are more filterable demands to a body of hot water, which is in use on a regular basis.

Just remember these few things for a sparkling pool or hot tub:

  • Use good quality clarifiers, shock the water to remove buildup by organic matters, such as leaves, pollen, algae, dead skin, and so on.
  • Add clarifiers as needed to get rid of dust and dirt.
  • Take good care of your filter and pump because without them, a sparkling pool or hot tub will remain beyond reach.

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