For the more discerning pool owner who wishes to test for additional parameters. Deep Blue Pro 6-Way Test Strips provide a quick and easy way to test water. Following recent changes to shipping regulations post-Brexit, we can no longer lawfully ship Chemicals overseas to addresses in Northern Ireland - please do not attempt to checkout with chemicals in your basket if you are a resident of Northern Ireland. Perfect for the residential user, Wave test strips are manufactured in the UK and subject to the same rigorous quality control as other pool testing products.