I just got my shipment of rock, 150 lbs and put it into my tank to cycle. It was loaded with life, and I have some questions about what to do with some of the life. I would tend to say if I don't know what it is for sure, it isn't going into the tank for fear of introducing predators down the line (crabs, starfish, brittlestars, snails). Is that the best advice, or should I put it all in and not worry about it?