Kwakatoo
Aquarium Advice Freak
Found an answer on the sand Google is good, mm-kaayyy
"Before putting sand into your aquarium it's recommended that you give it a good clean. You clean sand in very much the same way as you would gravel. Using a reasonably large bucket, pour some sand into the bucket, don't put too much in, probably a quater of a bucket full of sand would be okay. Then add water and start swilling the sand around. After two or three minutes carefully tip the water out of the bucket and if need be repeat the process until the water runs reasonably clean. You're never going to get the sand totally spotless, you just want to remove the worst of the dust."
Sent from my iPad using Aquarium Advice
"Before putting sand into your aquarium it's recommended that you give it a good clean. You clean sand in very much the same way as you would gravel. Using a reasonably large bucket, pour some sand into the bucket, don't put too much in, probably a quater of a bucket full of sand would be okay. Then add water and start swilling the sand around. After two or three minutes carefully tip the water out of the bucket and if need be repeat the process until the water runs reasonably clean. You're never going to get the sand totally spotless, you just want to remove the worst of the dust."
Sent from my iPad using Aquarium Advice