There a few steps you should take when you add rocks you find outside to a tank.
First is to make sure the rock is safe for an aquarium. Sprinkle a little vinegar on it and see if it fizzles or foams. You can also test the water after adding them.
You want to make sure they won't crumble or...
I got my first piece of driftwood. I read on the forum that boiling the wood can cause the wood fibers to break down. If I use chemicals, they could be absorbed by the wood and leach out later.
So what's a good way to disinfect driftwood?