Hey I bought that sand from you remember me asking if having that loose change in the sand was bad and you said sift it and it will be ok well guess what you were wrong I used that sand after sifting it very well and letting my tank complete its cycle I installed all my live stock and much to my surprise my coral began to die was racking my brain trying to figure it out and guess what was wrong there are traces of copper in my water samples and I have not added any talking with and working with a local store he had told me the sand is infected with copper so I lost several hundred dollars in corals an I am not pleased