type of tumbling media

[NorthWoodsDiver]

Whats the best grit of aluminum oxide chips for tumbling steel tanks. I am looking at the gmc products but they dont specify what they sell and I am trying to compare prices with other companies. Anyone know of a good place to get it too? Thanks

 

[pescador775]

Al oxide is very aggressive for use on heavy rust. I don't like the big chips though. I use aquarium gravel with about about 1/8 inch grain size.