Rinse this sand before using it.
I bought sunset gold, it is a beautiful sand. It was just enough light to really illuminate the tank, but not a bright white that might strain my beta. The sand arrived dry, and I still don't know if it should arrive this way. Considering that the side of the bag had cracked by the time it arrived, I couldn't flip the bag to see if it should be washed. I used it without flushing, which was a mistake. I ended up with a very muddy water tank and a filter that had to work overtime to purify half the water. Two weeks later, my water tank was still a little gloomy. To find the sand a little dirty. If you get this sand and rinse it, I can't emphasize it enough. Rinse it. Pour the sand into a clean bucket, do not fill the bucket more than half, take it outside, open the hose so that the water does not flow too fast, insert the hose into the sand, let the water flow out of the bucket for a few minutes, remove the hose, gently pour the water out of the sand, then insert the hose back into the sand, rinse the sand again, and then take out the hose again and pour out the water. Do this over and over again until the water in the bucket finally clarifies. At this point, rinse the sand a few more times. This should be clean enough to put in your tank instead of soiling your water. That's what I do with the rest of the sand. I use it in my little water tank.