Had to take down tank 18 months ago no place to put LR so I put it out side on plastic tray. Was rained on, sat in rain water from time to time, leaves fresh water algae (green and slimmy). Now to question, can or should I use this rock again, it was origionaly from fiji. I have it in rubbermaid on patio with hi flow pump and NSW (1 week). How much live rock needed to seed it fast? will the fresh water algae growth be a problem? Its about 70 lbs total weight. The more I look at at it, the less I think it will be worth the effort or potential issues. Any one who has done this please share, Im all ears.