Can dead rock b"com live

[kominato]

Hi...I hav 2 dead rocks amongst the many live rocks in my tank now for abt 5 months. So will these 2 ever b'com live? Thanks

[Terryz_]

Ya... the bacteria will colonize them and make them 'live'... But will take some time...

[ryz]

what do you mean dead rocks? Is it porous? If it doesn't have large surface area, little bacteria can colonize. rendering it useless.

[kominato]

Previously from my fresh water tank, 2 large pieces, abt 6 to 7 kg each, i notice they look more reddish brown and my turbo snail is on it quite often. Thanks for the advise though.

[tiger]

I am also trying that out. My new current setup about half are dead marine rock (turn white), after about 1moths, now colonnised with green substance, wait n see how. Been adding calccium weekly basis.

[dravan]

of course can becum live... tried half tank dead... dried the rocks n half tank live... used the live rocks to seed the dead rocks....

[ryz]

Most rocks used in FW are non porous, except lava rock. So its ill not have much bacteria colonizing it and is as good as not putting any rocks. It might be aesthetically pleasing but would be of no use to biological filtration. From your description of the rocks, I do not think they would be able to turn live. Maybe you could post a pic which will aid me in confirming my answer.