sand?

[Rohman]

I have some sand from a previous tank (still dry). its .1 to .5 mm in diameter , or at least thats what it says on the package. It says "Nature's Ocean Marine White Sand Premium Marine Substrate " on the side. Is that ok to use?



second question
Is there any type of gravel,sand,rock... not to use

 

[joel_ang]

I'm not sure what substrate's not good but the sand that you currently have can't be too bad since it says marine substrate. But give it wash before you add it.

 

[Rohman]

ok thnx

 

[joel_ang]

No problem, and you're welcome!