Would this work for a tank with a bullhead and a Northern hog sucker here if not is there any other black sands that are relatively cheap I cant find colorquartz near me and shipping is outrageous that is why I am looking at the Black Diamond. Also what size would be better 20-40 or 30-60.
Here is a pic and the product info

Black Diamond Granules are coal slag abrasives used as a blasting media to remove paint and rust from surfaces to produce a clean, ready for repaint finish. Black Diaond coal slag granules are very hard and angular in shape, making their cleaning speed and cutting ability very efficient and productive. Black Diamond coal slag also has very low free silica content(less than 2 percent).

Here is a pic and the product info

Black Diamond Granules are coal slag abrasives used as a blasting media to remove paint and rust from surfaces to produce a clean, ready for repaint finish. Black Diaond coal slag granules are very hard and angular in shape, making their cleaning speed and cutting ability very efficient and productive. Black Diamond coal slag also has very low free silica content(less than 2 percent).
