Hello everyone, I am new the the Reeftank community and let me tell you all that there is alot of knowledge in these forums alone. I cant belive how much I have learned in the last few days. You guys and girls really know your stuff. I am currently setting up a 46 gallon bowfront tank and I just returned from home depot to pick up a bag of sand. The bag that it came in looks exactly like the one posted but it does not say southdown on the top. It is made by old castle. I wanted to ask you guys first before I just put it in is it safe to use it.