Iv had a marine tank 6-7 years and enjoyed it but lately lost interest and have sold my fish and crabs and corals. Now the tank has no live stock except what ever may be living within the rocks.
can I…… remove the water then fill it with tap water and go buy tropical? I’d also remove my rocks and sand and swap them for gravel and new ornaments. But can the same tank be used or would the water be contaminated from the salt water?