HELP !!!!....Maybe one of you who have more knowledge in this depart can help me out. i have a dead tangelos tree (citrus family) that i want to used as driftwood (root part) for my tank, but cannot find any information at all on it (safe, not safe, hardwood?leak oil? sap? etc...). i have crystal shrimp and don't want them to died because of my lack of knowledge. Any info would be grateful, Thanks!