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  • Writer's pictureErinn Dethloff

The Essential Guide to Pool Chemistry, Filtration, and Circulation

Welcome to your ultimate guide on mastering the art of pool maintenance! As a homeowner with your own backyard oasis, it's crucial to understand the key elements of pool care - chemistry, filtration, and circulation. In this listicle, we'll break down these essentials to ensure your pool remains crystal clear and inviting all season long.


1. Pool Chemistry


Maintaining proper pool chemistry is the backbone of a sparkling and safe swimming environment. Balancing chemicals in your pool is essential to prevent bacteria growth, algae blooms, and skin irritations. Here are the key chemicals you should be familiar with:


a. pH Levels

  • Ideal range: 7.4 - 7.6

  • pH measures how acidic or alkaline the pool water is. A balanced pH ensures comfort for swimmers and protects pool equipment from corrosion or scaling. There will be times when the pool water will call to be higher or lower depending on the Langelier Saturation Index (LSI)

  • Low pH (below 7.2) can cause skin and eye irritation, while high pH (above 7.8) can reduce chlorine effectiveness and lead to scaling.

  • Lowering pH: When your water is calling for a lower pH you will need to use muriatic acid to drop the level.

  • Raising pH: When the water is calling for a higher pH you use a chemical called Soda Ash. If you have a vinyl or fiberglass pool you will be using more Soda Ash than with a plastered pool.

  • Cautions: Be very careful using Muriatic Acid it can cause damage to your skin as well as your property. Also, when adding muriatic acid to the pool dilute in a bucket first and then administer it to the pool vessel.

b. Chlorine

  • Ideal range: 1 - 3 ppm during the winter months, 3 -5 ppm during summer months

  • Chlorine is the most common sanitizer used to kill harmful bacteria and algae. Keeping the chlorine level stable is essential for maintaining a safe pool.

  • Too little chlorine results in water that's susceptible to contamination, while too much can irritate swimmers.

  • Adjustments: Trichlor tablets or an oxidizer commonly known as shock can be added to bring the chlorine level to the proper level.

c. Alkalinity

  • Ideal range: 80 - 120 ppm

  • Alkalinity acts as a buffer for pH, helping to prevent drastic changes. If alkalinity is too low, the pH level can fluctuate widely, while high alkalinity can cause cloudy water.

  • Adjustments: When lowering Alkalinity it will be adjusted like your pH, bringing it up to the proper level you will need to use Sodium Bicarbonate (Baking Soda)

d. Calcium Hardness

  • Ideal range: 200 - 400 ppm

  • This measures the amount of calcium in your water. Low calcium can cause etching on pool surfaces, while high calcium can lead to scaling and cloudy water.

  • Adjustments: The only way to lower the calcium level in your pool will be to dilute the water using a water hose. It is good to know how much calcium you have in your tap water. To add calcium to your pool you will use a chemical called calcium chloride. When adding this to your pool you will need to mix it in a bucket first then pour it into the pool vessel. Note: Calcium can become very hot when it is added to water. Be cautious not to get any on you when mixing it in a bucket.

e. Stabilizer (Cyanuric Acid)

  • Ideal range: 30 - 50 ppm

  • Cyanuric acid protects chlorine from being broken down by the sun’s UV rays, especially in outdoor pools. However, too much stabilizer can reduce chlorine effectiveness.

  • Adjustment: At this time there is not a product that will reduce Cyanuric Acid. The only way to reduce Cyanuric Acid is to dilute your pool with a water hose. Note: Cyanuric Acid comes from Trichlor Tablets.

f. Salt

  • Ideal Range: 3000 to 3400 ppm

  • If you have a salt pool, it will be the primary sanitizer. It is important to know that having too high of a salt level will cause the pool to stop producing chlorine.

  • Adjusting: When adding salt to the pool it needs to be added straight into the pool vessel.

  • Note: A salt pool is still sanitized by chlorine. Chlorine is produced by the salt cell on your equipment.


Pool Chemistry

2. Pool Filtration


A reliable filtration system is your pool's best friend in keeping the water clear and debris-free. The filter works by trapping dirt, leaves, and other particles, ensuring your pool water remains pristine. Here are the primary types of pool filters you might encounter:


  • Sand Filters: Common and cost-effective, sand filters trap debris as water passes through the sand bed, requiring periodic backwashing.

  • Cartridge Filters: Cartridge filters offer superior filtration by capturing finer particles. They are low maintenance and provide excellent water clarity. Cartridge filters need to be disassembled and cleaned every 3 to 6 months. The cartridges will need to be replaced every 3 to 5 years.

  • Diatomaceous Earth (DE) Filters: Known for their exceptional filtration capability, DE filters use diatomaceous earth powder to trap particles, delivering the clearest water quality. DE filters do need to be backwashed periodically. The DE filters will need to be disassembled and cleaned every 3 to 6 months.


Pool Filtration

3. Pool Circulation


Proper circulation is key to distributing chemicals evenly, preventing algae growth, and maintaining consistent water temperature. Adequate circulation also ensures that debris is carried to the filter for removal. Here are some tips for optimizing pool circulation:


  • Run Your Pump: Ensure your pool pump operates for 8-12 hours daily to circulate water effectively. Longer filtration helps in distributing chemicals and capturing debris.

  • Use Skimmer Baskets: Regularly clean skimmer baskets to prevent clogs and maintain efficient water flow. Clearing debris promptly enhances circulation and filtration performance.

  • Position Return Jets: Direct your pool's return jets downward and outward to create a circular flow pattern, maximizing water circulation throughout the pool.


Pool Circulation

By mastering the trifecta of pool chemistry, filtration, and circulation, you are well on your way to enjoying a clean, healthy, and inviting swimming pool. Remember to test your water regularly, maintain your filtration system, and optimize circulation to keep your pool in top condition all season long!


Dive into the world of pool care today, and let your backyard oasis shine bright!






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