Take the rocks and put some vinegar on them. If they do not fizz then you can boil them and let them cool in the water - do not cool them in the air or in cool water or they could explode. Then they should be okay for the tank. If the rock fizzes when the vinegar hits it then you cannot use it in the tank. The driftwood is another story. I don't want to comment on it. We will see if we can get comments from someone who has used driftwood this way, okay?
Hope this has helped a little.
Welcome to Fishlore! I am so glad to meet you. This is a fine site and we have a lot of folks here who will be glad to help you. I love it here and hope you will as well.
Rose
