As far as the rock you can do this. Then it could be used as base rock pieces if you like some of them and then you do not need to buy as much LR. So say you could buy 25lbs LR and use 15 of the nukes rock. The LR will seed the base after a while. As far as the LS I will look for a good nuke procedure for that and you could if you wanted buy less LS. Process to nuke rock below. FYI I grabbed this from another thread. Soak the rock in a 50/50 bleach and water solution for about 2 days. Drain the soaking container then soak the rock in clean fresh water for 2 days. Drain the container again, rinse the rock in fresh water and soak again it in fresh water again for another 2 days. Then add a 2lb box of baking soda per 15 gallons of water and soak the rock again for 3-4 days. Drain the container then soak again in fresh water for a day then remove the rock and let it sit and dry for 3-4 days (The baking soda soak is to neturalize the acid and low P.H from the bleach). "