I've been wanting to change my 29 gal over to black sand ever since I saw a tank with black substrate. It's gorgeous, and it will make the fish I'm going to add look beautiful. But I also want kuhli loaches in the tank; I'm set on this fact (don't worry; I know they work in my water). I was looking at the CaribSea Super Naturals black sand
, but I'd heard that it was sharp and can cut delicate burrowing fish like the kuhli loaches. Can anyone confirm or deny this? I tried to test the sharpness through a bag, but that didn't really work.
So. To those who have this sand: is it sharp? Do you think it would hurt a burrowing loach?
Also, how much sand should I buy? This tank is 29 gallons, and I plan to plant it heavily with 6-7 species of plants both rooted and stem.