How can you make a rock safe for an aquarium?

[nomadman2003]

I have a nice piece of obsidian rock that I'd like to put in my next tank. Is there a guide or procedure to getting something ready to be put in an aquarium?

Common sense makes me think that for a rock you really only need to clean it (no detergents or lingering chemicals) and sanitize it (via heat), anything else?

Obsidian likely wont, but I can imagine rocks messing with pH levels, so soaking it in a bucket of water and watching the pH change, if any. If it does change does that mean the rock isn't safe for the aquarium?

Anything else I need to be aware of?

I used to make my own beer and would use Oxyclean and No-rinse Iodine to clean and sanitize (respectively) bottles, are those good cleaning agents for this case?

Thanks.

 

[RedFlame]

Check out this link, hopefully it answers some of your questions.

Rocks For Use In The Aquarium - Tropical Fish Forums

 

[nomadman2003]

Check out this link, hopefully it answers some of your questions.

Rocks For Use In The Aquarium - Tropical Fish Forums

Excellent link. Thank you!

 

[pitdogg2]

I have used Amethyst,Geodes,Jadeite,Marble and Tigers eye(red,orange and Gray) in my AQ for many many years with no ill affects on any water parameters. I always boil first for 10-15min and have never had any explode although I put the rocks in first add water then fire never cold rocks into boiling water.