Help! My Swimming Pool Has Turned Green with Algae

The following guide provides step-by-step instructions for opening your pool after winter.

The upcoming swimming season requires you to start preparing your pool for the upcoming warmer days. Clearing up a green algae-coated pool after winter cover removal is achievable with proper methods and products. Follow these recommendations to achieve clear water.

### Step-by-Step Process

1. **Check and Adjust pH Levels**

The first step is to measure the pool pH through test strips. A pH level between 7.2 to 7.6 provides optimal shock treatment effectiveness.
Check the pH level of your pool before proceeding with adjustments.
Use these pH adjustment products:
For lowering pH use [Deep Blue Pro pH Minus 1kg](https://www.thepoolcleaners.co.uk/product/deep-blue-pro-ph-minus-1kg-ph-ph-decreaser/).
For pH increases select [Deep Blue Pro pH Plus 1kg](https://www.thepoolcleaners.co.uk/product/deep-blue-pro-ph-plus-1kg-ph-ph-increaser/).

2. **Shock the Pool**

A shock treatment should be performed to eliminate algae and sanitize the water. Liquid chlorine provides fast action yet shock granules prove equally efficient.
The following products should be used:
You need Relax Shock Chlorine Granules 5kg as one of your shock treatment products available at [https://www.thepoolcleaners.co.uk/product/relax-shock-chlorine-granules-5kg/](https://www.thepoolcleaners.co.uk/product/relax-shock-chlorine-granules-5kg/)
– [Certikin 10L Ultra Pure Sodium Hypochlorite 10/11%](https://www.thepoolcleaners.co.uk/product/certikin-10-ltr-ultra-pure-sodium-hypochlorite-10-11-sh1010up/)
– [Certikin 10L Sodium Hypochlorite 14/15%](https://www.thepoolcleaners.co.uk/product/certikin-10-ltr-clear-sodium-hypochlorite-14-15-sh1410/) (for businesses)
The second step involves pumping water through the pool circulation system or manually distributing shock treatment across the pool surface while using a pool pole for stirring.

3. **Scrub the Pool Liner**

After water clarity returns you should employ a liner cleaner to remove existing algae deposits and stains from walls and floor surfaces.
The recommended product for this task is:
– [Blue Horizons Tile & Liner Cleaner 2L](https://www.thepoolcleaners.co.uk/product/blue-horizons-tile-liner-cleaner-1-x-2-litre/)

4. **Choose the Right Brush for Cleaning**

The pool pole equipped with a wall brush attachment will provide the best results for surface cleaning.
The selection includes:
– [Graphite 10-Inch Wall Brush](https://www.thepoolcleaners.co.uk/product/certikin-graphite-10-wall-brush-ccmg81/)
– [Graphite 18-Inch Deluxe Wall Brush](https://www.thepoolcleaners.co.uk/product/certikin-graphite-18-deluxe-wall-brush-ccmg51/)

5. **Prevent Future Algae Growth**

Using algaecide products together with multifunctional chlorine tablets as part of regular maintenance will help stop algae development.
Suggested products:
The Certikin 6-Inch Algae Brush serves as an essential tool for preventing algae growth (https://www.thepoolcleaners.co.uk/product/certikin-6-algae-brush-hd69/).
For controlling algae growth use Deep Blue Pro Algaecide 5L as an algicide agent.
The product includes Deep Blue Pro Multifunctional 200g Chlorine Tablets 5kg which provides long-lasting stabilised clarifier properties along with algae inhibition capabilities (https://www.thepoolcleaners.co.uk/product/deep-blue-pro-multifunctional-200g-chlorine-tablets-5-kg-long-lasting-stabilised-clarifier-algae-inhibitor/).

6. **End-of-Season Winter Treatment**

The application of winterizers before the end of the season helps minimize algae development thus simplifying next year’s pool opening process.
Apply [Blue Horizons Ultimate Winter Time 5L](https://www.thepoolcleaners.co.uk/product/blue-horizons-ultimate-winter-time-1-x-5-litre/) at the end of the season.

These steps will help you move your pool from its winter state into a clean swimming oasis. Happy pool season!