I just like to say a massive thank you! After having problems as my tap water, which is very high in nitrates, Carl recommended I try C3 Nitrate Media and WOW within 72hrs my tank was crystal clear with very low nitrates. I am very very happy! In my honest opinion I believe that the combination of the products has improved the quality of my water and it is so much better for the fish. It is doing exactly what it is supposed to do. I would highly recommend both the products to anyone who is struggling with nitrates and would like to breed their fish or just to improve water quality overall. Once again, a massive thank you to all involved, especially Carl Dutton.