Send us about 5 pounds of your used abrasive. This should be gathered from various depths and areas of you tank, since finer abrasive will tend to settle near the top. Gathering the abrasive from various locations will give a more representative sample. We will perform a sieve analysis of your abrasive and provide you with a report showing the breakdown of the mesh sizes. Based on this you can decide what the next step should be. Typically if the numbers look good, a company will send us 2000-4000 pounds of their used abrasive and we will run it through the recycling system. You would certainly be invited to come watch the WARD Pro while it works. We will then ship your recycled abrasive back to you so that you can cut with it and see the results first-hand.