wow thanks for this post so much..I have been trying to tell my best friend to get that C.C. out of his tank and use sand..These pics are a proven piece of beauty and knowledge..Looks so much better. Did you pull all your rocks out and scoop the C.C. out..Sorry for the Questions but since my buddy saw the diff. He is going to change out and since you have just done it I would love some advice to help him out.