How do you know when LiveRock is done "Cooking"?

[JohnnyReeftank]

Wish I would have done this! The live rock I bought has apparently been in a FOWLR tank since the late 70's and its probably the cause of my constantly evolving algae blooms. I've literally had almost every type of bad hitchiker in the books...but a few good ones too so its not all bad. Thanks for the link Myka....definately looking into cooking or Marco rocks for my next tank

[Myka]

Oh jeez...that sounds like some seriously nutrient laden rock!

[Bryan]

May also want to look up acid washing the rock as well, dissolves a thin outer layer off the rock further reducing any phosphates etc.