Ok so i have a good deal on a crate of LR thats being delivered to the store tonight. The LR is straight off the plane and being sold in 60lb crates for tonight only. What is the best way for me to introduce the rock to the tank? All at once or slowly over time. Right now the tank is only about 3 months old, with 15lbs of rock in it. Its a 70gal Cube with a 30 gal sump filter in it. The only think im really worried about is hurting my Snowflake Eel.