Black Substrate

[steven33]

Any suggestions on inexpensive black substrate for a 75g that is aquarium safe?

Is white silica sand (for sandblasting) ok for substrate?

 

[jft]

Tahatian Moon or black sand from seachem would be my advice

 

[Liquidplants]

There may be a correlation between silica sand and brown algae which is caused by high levels of silicates and nitrates. Maybe an MFK expert can advise.

 

[chris_zx2]

At my local pool store they carry crushed natural stone for pool filter sand and it is black, actually has the occasional gold flake in it.

 

[sashimimaster]

At my local pool store they carry crushed natural stone for pool filter sand and it is black, actually has the occasional gold flake in it.

What's it called? How much is it? I'm looking for about 100lbs.

 

[artman540]

Is tahitian moon sand okay for rays?