Just natural aquarium gravel, water and a drop of Dawn dishsoap.....i actually decided not to run them again, and yea, just want them to be spendable.....the V and Shield I just threw them in because it couldnt make them any worse, but also didnt really help much either...the V has no date and the Shield I can only read 18.....thanks for the advise Digger, I havnt tumbled before so I didnt know how long to run them for lol