What if I use a more coarse silica based sand. It is not super fine. The reason I want to se this is because of color and price. I need a few hundred pounds.
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what ever you think you need half it or you will just have a big hill at the back of the tank
order a few samples and go to a few LFS and bring some home and put it in water as the colour changes a lot and run your fingers throw it a lot in water and if it feels sharp in anyway forget it as if its sharp on your fingers after 10 mins think what it will be like on the rays disk 24/7
i found some sand that looked perfect and after running my fingers throw it my fingers were tinggly
you can go on just pool filter sand as they are all different
unless someone recomends a branded sand then you need to test it your self