When I got my tank going I used the cheap Home Depot basic sand. I had heard everyone talk about target sand and stuff but I could never find it. One day I decided to just get the cheapest sand and try it out when I saw someone cleaning up the "sand aisle". I saw he had a few half empty bags of sand in bigger bags so I asked what they did with it. He said it can't be sold and anyone can take it. After cleaning it up they either put it outside by the contractors entrance or by the dumpster. Being ultra-cheap, I stopped in whenever I was driving by and in no time I had all the sand I could use and then some for free. I even got fussy and would only take the sand if the bag was at least 3/4 full and the hole was small. They do the same thing with the bags of gravel, cement, etc.
