Excellent products and arrived intact and in good time, so thank you. I do have one issue I would like to raise again. That is recycling the old filter cartridges. I have asked before but didn't receive an adequate response. I believe every company now should be looking to the sustainable development goals to inspire business practices that are kind to the planet and its precious resources, so I would like to ask how can I recycle the old cartridges? And, if you don't offer a recycling service can the company please review this policy? A circular economy is much less wasteful. Thanks very much for your understanding! If you could please let me know the answers to these questions via this email address that would be great. Yours, a genuine and loyal customer.