Thanks alot. We have put alot of work into it. It didnt take me long to rotate those blocks. I agree with you on the fish tank and sump tank. I will change those out. Thanks for all your advice. If it wasnt for this forum i wouldnt have the system i have now. Everybody else wants you to buy a book or video to get there help. I called oliver up one day and ask him a few questions about it and he pointed me to this forum. the best thing i have ever seen. Cant wait to get my plants in. thanks again. everybody.....