I picked up a saltwater setup that I am converting to freshwater. Can I use the live sand from the saltwater setup for my freshwater setup without serious issues?
It could have different organisms in it and it depends on what the sand is made of. So 2 possible issues. The first only requires a disinfectant (bleach + water rinse, then thorough rinse clean.) The second depends on what is actually is and what will be in the FW tank.