... where are all of the threads that explain the cleaning process? Today was the first day nice enough to be outside in shorts and a T-shirt so I grabbed the chance to be able to wash the bag of BDBS outside using the hose. To be honest, I thought that I had cleaned the Black Diamond blasting sand (BDBS) very well, as the water coming off of the sand after 3 or 4 washes was clear; however, as soon as I put the BDBS in the aquarium and started adding water it became very (unclear) clear that I should have used warmish water and that I should have also used some sort of surficant to be able to remove the oily residue and also the black dust, before adding the BDBS to the aquarium. I am currently running just a Penn-Plax Cascade 1000 canister filter on the tank right now using just the coarse foam and then 5 of the white polishing pads to try to rid the tank of the fine black dust and oil. The tank is surprisingly clear considering the filter has been running for just about 6 hours or so. How does everyone else that uses the BDBS or has used BDBS in their tanks, clean the gravel to avoid this mess? Thanks for any insights into this! I have a few more aquariums that I could setup and I also have another 50LB bag of the BDBS waiting in the wings. Thanks, Mike tl3 p. s. I thought that I had read in the forums that someone actually used Dawn dish washing liquid to wash their BDBS and didn't have any problems with their fish after doing so. p.s.-2 This is a 55g aquarium.