Min cooking the LR is putting it in a dark container and leaving it with out light for weeks. With razor calurpa I have tried that (6 weeks) Me and abotu 5 buddies picked every little peice I we could find, I even took a torch to the holes where it was to get them. it went white and disappeared, but 2 weeks after being back in the tank it was back in full force. Cooking LR will not cause the tank to cycle.
Now for a more drastic method you could boil the rock in hot water. I have a done this also. It basically kills all life on the rock and turns it bone white. You could then put it back in with some new lr and the new would seed the boiled stuff back. Takes a few months but saves having to buy a new.
When adding a neew peice of LR to my established tank this is what I always do. I didnt want to risk parasite/algae/cycle to the tank. It looks kinda weird being bone white, but it is like a brand new Apartment building waiting to be occupied. After a couple of month you couldnt tell it from any other rock in the tank.
mike
Now for a more drastic method you could boil the rock in hot water. I have a done this also. It basically kills all life on the rock and turns it bone white. You could then put it back in with some new lr and the new would seed the boiled stuff back. Takes a few months but saves having to buy a new.
When adding a neew peice of LR to my established tank this is what I always do. I didnt want to risk parasite/algae/cycle to the tank. It looks kinda weird being bone white, but it is like a brand new Apartment building waiting to be occupied. After a couple of month you couldnt tell it from any other rock in the tank.
mike