concrete backer board

[MSMAN825]

anyone know if this stuff will work in a reef tank

 

[Chiefmcfuz]

You mean like green board?

 

[MSMAN825]

the stuff you put under ceramic tile.

 

[Chiefmcfuz]

Bad. It will mess with your PH and water quality.

 

[Deanos]

DUROCK cement board MSDS

Excerpt: ENVIRONMENTAL TOXICITY: Portland cement is expected to be toxic to fish due to its high alkalinity (pH > 12).
Discharge of large quantities directly into waterways would be expected to cause significant fish kills.

 

[MSMAN825]

ok, thank you for the info, now i gotta find star board.