Help & Advice

You can find in this section technical support guides and information to help you get the best out of your pool or spa. Read our Help & Advice here


Troubleshooting problems in swimming pools and spas. Read our FAQs here

Fast Delivery

Delivery is FREE for all orders over the value of £75.00 and £10.99 for orders under this value to mainland UK. Read more about our delivery policy here

Pool Size Calculator

Knowing your pool's volume is vital when making adjustments as all calculations and dose rates are based on it.

View Pool Calculator

Excellent Reviews

See what our great customers are saying about us on Truspilot.

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About Us

In response to the evolving situation around COVID-19, Online Pool Chemicals is taking all necessary precautions by following advice from both GOV.UK and NHS guidance in the UK.
We are able to confirm our manufacturing facility is fully operational.
As a UK manufacturer of swimming pool, spa and hot tub chemicals we have always held a large stock of raw materials and products to ensure efficient supply to our customers.
In direct response to the COVID-19 pandemic, we’ve taken actions helping to ensure the safety and well-being of our employees, customers, suppliers, and the broader community. This includes a business planning team that is closely monitoring the situation and responding to help minimize disruptions and ensure safe and reliable supply of our swimming pool, spa and hot tub chemicals.  With our manufacturing base, storage facilities we’re responsive and able to serve our customers to meet ongoing demand.
We are working closely with our delivery companies (UPS and DHL) to ensure an uninterrupted delivery service. Deliveries may be delayed as some couriers are experiencing  issues. Please allow an extra few days for your products to arrive.

In these uncertain times the OPC Team will do its best to meet your needs.
Thank you for your custom.

With kind regards,

James Lee
Managing Director, OPC

What we are about...

Online Pool Chemicals provide swimming pool and spa treatment chemicals direct to you. We are a major UK manufacturer of pool chemicals so buying direct from us, saves you money and assures you of the quality and safety of the goods you are buying.

We have been manufacturing swimming pool chemicals for over 10 years and as well as focussing on chemical quality we also focus heavily on customer service. This means you can be sure of an excellent responsive customer experience. In our surveys 99.9% of our customers are completely satisfied with their experience buying pool or spa chemicals from us and on the very rare occasions something does go wrong we put it right immediately with no hassle for you.


Image of a poolWe work very hard for you to make our service as good as it can possibly be but if you find there is something we are not providing that you need then please let us know, you can find out how to contact us on our contact page

We conform to all industry standards for pool chemical manufacture, supply and health & safety. This means you can be 100% confident in all of our procedures and of course, all of our chemicals are supplied with clear, easy to follow, safety, usage and storage instructions; safety data sheets can also be downloaded from the product pages on this site.

So, thanks for visiting our site, we really value our customers and they love the value and service we provide, I hope you will join them.

Many Thanks, Team