I know i was already asking about sand but the pool filter sand around me is very expensive. This tube sand is coarse do you think it would be safe for the fish tank?
http://www.homedepot.com/h_d1/N-5yc...splay?langId=-1&storeId=10051&catalogId=10053
http://www.homedepot.com/h_d1/N-5yc...splay?langId=-1&storeId=10051&catalogId=10053