Treating Algae in Natural Swim Pools: A Simple and Effective Approach
Q. Interested in Coptrol for a problem in my natural pool. I need water tested, algae identified and dosage rates.
ANSWER
Natural swim pools offer a beautiful, chemical-free swimming experience—but like any natural water system, they can be prone to algae growth. The key is using the right treatment approach while maintaining a balanced ecosystem.
Using Coptrol for Algae Control
A reliable option for treating algae in natural swim pools is Coptrol aquatic algaecide. It’s a safe and effective product when used at the correct application rate.
Most natural swim pools typically hold between 50,000 and 75,000 litres of water. With Coptrol applied at a rate of 5 mL per 1,000 litres, this equates to:
- 250 mL for a 50,000 L pool
- 375 mL for a 75,000 L pool
At these relatively low application volumes, most natural pool owners can move straight into treatment to correct algae issues.
What to Expect After Treatment
In many cases, a single application is enough to bring algae under control. If any regrowth (or “bounce-back”) occurs, that’s usually the point where further investigation and water testing may be worthwhile.
However, from practical experience, algae problems in natural swim pools are most often linked to nutrient levels—particularly phosphorus.
Addressing the Root Cause: Nutrient Control
To improve long-term water clarity and reduce the chance of algae returning, it’s important to manage nutrient levels after treatment.
Depending on your pool type:
- Clay or earth-based pools:
Use a phosphorus-binding product like Phoslock phosphorus remover - Pools with a liner:
A product such as Phosflow phosphorus treatment can be placed in a filter box or an area with good water movement
Reducing phosphorus helps limit the food source that algae rely on, making future outbreaks less likely.
Supporting Recovery with Beneficial Bacteria
After algae treatment, adding Aquatic WaterBac beneficial bacteria can help break down dead organic matter and improve overall water balance.
This step supports the natural ecosystem within the pool and helps maintain clearer, healthier water over time.
Learn More About Coptrol
For a quick overview of how Coptrol works and how to apply it, watch this video guide
You can also order Coptrol online here
