If you don't want to bother re-using media I would just stick with sand since it's cheap, works well and easy to get. I like using the red garnet because it cuts fast in the cabinet, but it is a little more difficult to get, more expensive and it doesn't come in large quantities like sand (not that I have found really). My cousin gave me a siphon blaster. I was going to use sand in it. He didn't like it because the sand didn't feed well because it was wet. I was planning on putting the sand on the stove or in the oven to cook the water out of it before I used it. I also have a sifting screen so it would be easy to re-use
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