Copper is one of the main residual sanitisers in the pool opposed to chlorine. Maintaing correct levels is important to ensure your pool is continuously sanitised and free from algae. All systems come with a simple Naked Copper Test Kit and we suggest you use this at least once a fortnight during summer months and every 4-6 weeks during the cooler months.
A simple guide is provided with every kit and our biggest tip to you is to follow the diagram as to how to look at the water after using the solution and allowing to sit for 5 minutes. With the cap off, look from the Top down to the bottom while placing on the yellow strip.
You can find a copy of the guide HERE.