Sand

[mcavanah]

I got a 200 gal build, i want to use black sand if i put normal sand on the bottom for the buffering then put the black sand on top will it still buffer correctly?

[JLiu]

Yes, but when you go to maintence your sand bed will get them mixed up.

[mcavanah]

thank you

[hobogato]

you could do a shallow black sand bed in the tank and put aragonite sand in the fuge.

[Ping]

Argonite sand does not act as a buffer until the sand bed is deep enough for the bottom layer of sand to become anerobic.