I am in the process of getting a larger 210 tank. So I will be scooping the live sand from the 125 and will put it into the 210. I will still be short some sand, so I don't think that I need to buy more live sand, so what type of sand should I get and where can I get online? The sand that I purchased for my 125 gallon was the Arag-Alive Caribean Pink sand. I am not sure of the size of the sand grains, but they are not real fine, they are a little large.