Old rock, new home (upgrade)

[afqu]

I have a 90 gal DT and getting ready to upgrade to a 130 DT. I love my 15 yr. old rocks. What would determine if they are too old to use? I imagine I will be adding more rock to be determined.

 

[huckjai]

Don't think they can ever be too old. Probably the older the better. Unless your rock is disintegrating for some reason.

 

[afqu]

Don't think they can ever be too old. Probably the older the better. Unless your rock is disintegrating for some reason.

No disintegrating, I have checked and I can't break off any pieces. Thanks for the reply.