Been thinking of this sub from the Tractor Store called black diamond blasting sand , I know it has other sizes that are stamp on the bag ,but what they have all the time is 30-60 grit size , Wounder if it comes any bigger. Has any one use this in this forum. I find it to be a little to fine for me but hear others having good plant growth for $7.99 50lb bags any one have pic's of your tanks with this.