I have some sand, about 80lbs. from a previous tank . I stored it in a rubbermaid container after after I sold the tank.I was thinking about adding about 2 more inches to the bottom of my 26g.The only thing is theres been some sweating going on in the container and I'm worried about what growing in the sand besides the stuff I need.Another thing is what could be the result of me disturbing my sand bed . The last time I added LR it was about six lbs. and my water never spiked, so I do have good bio filteration.Advise me please...............