Ok, I ordered 10 pounds of potters clay to try as a substrate. It just got here and it's grey, not red as I thought it might be. Is this a big deal ? Should I send it back and get red stuff? -- Richard J. Sexton richard at aquaria_net Maitland House, Bannockburn, Ontario, Canada, K0K 1Y0 +1 (613) 473 1719