What is The Difference Between Stabilised and Unstabilised Chlorine?

The world of pool chemicals and the different choices you can make are seemingly countless. One thing many pool owners, especially new pool owners, are faced with is sanitation. To clean your pool you need chlorine, then you find there are two types: stabilised and unstabilised. Making the wrong decision on these two types of chlorine won’t be the end of the world however it is very beneficial to know the difference and understand that both types are often used interchangeably however knowing when to use either is key. Unstabilised Chlorine The word unstabilised may get you a bit scared, by it’s very nature of being unstable! Don’t worry, it

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Why is There Sand in Your Pool and What You Need To Do About It.

It can be a worrying thing to suddenly see sand or glass media at the bottom of your pool. The most likely cause of the problem is that there is a break in either the laterals or stand pipe of your sand filter. Sand can sometimes be confused with dead algae, so before you call out a professional, take your pool brush and brush the sandy area. If the sand becomes a hazy cloud in the pool, this is algae and will simply need vacuuming up. Nothing to worry about. If the sand stays near the bottom and doesn’t create a cloud then the cause is almost certainly a problem

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How Often Should You Shock Your Swimming Pool?

Many pool owners new and old wonder how often their pool needs shocking. To shock your pool is by far the best way to remove algae from you pool as well as any other organic matter keeping your pool clean all season long. The downside to shocking is that you restrict the time allowed in the pool as the chlorine levels will be too high to swim in and you need to wait until the chlorine levels reduce to a safe level (3-4 ppm) before it is safe to swim. So, how often should you shock your pool? The simple answer is as often as it needs it. We will

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How Do You Dose Your Chlorine Tablets?

Swimming pool With Enclosure

90% of swimming pools we work with at XL Pools use chlorine to sanitize the pool. This typically involves using a tablet style chlorine which is very simple and easy to dose instead of measuring out chlorine granules and dosing to the pool. The way many pool owners dose these tablets is to drop the tablet into a skimmer where they will slowly dissolve. Whilst this is the commonly accepted method of dosing tablets some manufacturers of pool equipment advise against it as you will be introducing high levels of chlorine directly to your pool filtration equipment. When your filtration isn’t running you also will have a very high concentration

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How to Create a Pool Maintenance Plan

Outdoor Swimming Pool Design with Waterfall

It’s the one thing pool owners all share, the maintenance of your pool. Creating and sticking to a consistent plan of attack will help eliminate stress and save money on pool chemicals. Treating your water MORE OFTEN means using LESS CHEMICALS. This might seem counterintuitive, but it makes sense if you understand two things: 1. It’s easier to maintain chemical levels than it is to correct them. Imagine riding a bike. It takes a lot of effort to get started, but once you’ve reached a certain speed, you can maintain it with a fraction of the strain. As long as you maintain the speed, you can go for a long

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What to do if Your Pool Has a Nitrate Problem?

Nitrates are not an uncommon problem to have especially if you are in the UK. It is important to be mindful of the nitrate levels in your pool as a high nitrate reading could become into an algae nightmare. The secret to controlling nitrate levels is to test regularly and then you can respond quickly to rising levels before it becomes a problem. Before you start testing for nitrates, it’s good to know exactly what they are and what you need to do to remove nitrates from your pool water. What Are Nitrates? Nitrates are a naturally occurring contaminant to swimming pools. Nitrates are a plant nutrient typically found in

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Triple Gold, Pool of the Year & Contractor of the Year 2018

Tuesday 30th January was the date of this year’s British Pool & Hot Tub Awards, hosted by BISHTA and SPATA, held at the Ricoh Arena, Coventry. XL Pools put forward 6 entries in for an award. We are all very proud to announce that we collected three gold awards for: Residential Outdoor Pools £75,000 – £125,000 – Sellindge Project Residential Outdoor Pools £40,000 – £75,000 – Residential Indoor Pools under £100,000 – West Kingsdown Project We were also graced with the “Pool of the Year Award” as well as being awarded the prestigious Dick Millward Trophy for Pool Contractor of the Year for the second time (Previously in 2015) We faced stiff competition from other

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How to Fix Cloudy Pool Water

How to Fix Cloudy Pool Water

Waking up one morning and finding your pool has turned a white milky mess can be a daunting thing even for a seasoned pool owner. A cloudy pool can be a challenge to recover from so in this article we will explain why a pool becomes cloudy and offer you some tips how to get your pool crystal clear as quickly and easily as possible. What Causes Cloudy Water in a Swimming Pool? There are three main causes of cloudy water in a pool: The chemicals in your pool: Believe it or not, too much chlorine in a pool can cause a cloudy pool! Other levels could be too high

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The Perfect Times to Open and Close your Pool.

That sad time of year when the weather just doesn’t look as appealing, least of all to be running out into the back garden in a pair of swimming trunks! So it’s time to close the pool right? Well let’s explore the perfect time to close you pool… and open it too! The time you close your pool is key to good water quality and the amount of time and money you spend getting it back to health come the spring. Many customers rely on the use of their pool to dictate the close down and importantly the opening of the pool which could be a mistake as a late

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Swimming Pool Heating

There are essentially two different types pool heating systems, primary and secondary.  A primary system is a system where the home owner sets thermostatic controls at their desired temperature (typically between 22°C and 30°C), and the heating system will, as long as it was correctly sized, specified and installed, operate up to and until the water reaches that desired set temperature, irrespective of external factors like the ambient temperature, the weather, amount of sunshine etc, and then maintains it at that temperature, again, irrespective of any outside influences.  A secondary system will raise the water temperature, but is dependent on outside factors which will impact its performance, such as the

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About XL Pools

XL Pools are a team of dedicated professionals who have built a reputation for outstanding swimming pool design and construction. We are the leading suppliers and installers of Compass Pools.


XL Pools Ltd

t: 01233 840336


a: Unit 5 The Glenmore Centre, Moat Way, Orbital Park, Ashford, TN24 0TL

Award Winning Pool Installation

XL Pools is an award winning Swimming Pool Installation company.

Swimming Pool Contractor of the Year 2018 & 2015

11 x SPATA Gold Winner