Congrats on the tank. Getting a new tank is always fun.
Beach drift wood is ok to use. I've used several pieces I found there.
Just make sure the wood isn't soft at all, isn't greenwood (fresh off a living plant), and has no bark. If it has any of the above then it will rot and foul the tank.
To determine if it is soft scratch it with your fingernail. If you get gunk off, then it isn't suitable. Try scraping the soft stuff away with a metal brush or something until only hardwood remains.
You might also want to boil the wood a bit in water to leach out some tannins and salt.
Bubbles probably aren't anything to worry about, just air trapped in the wood being squeezed out by water replacing it.
Might be a good idea to take a picture of the light bulb with something to give it perspective - like a coin, it would be easier for us to identify it.
Also, the 100w heater should be fine for the tank.
Beach drift wood is ok to use. I've used several pieces I found there.
Just make sure the wood isn't soft at all, isn't greenwood (fresh off a living plant), and has no bark. If it has any of the above then it will rot and foul the tank.
To determine if it is soft scratch it with your fingernail. If you get gunk off, then it isn't suitable. Try scraping the soft stuff away with a metal brush or something until only hardwood remains.
You might also want to boil the wood a bit in water to leach out some tannins and salt.
Bubbles probably aren't anything to worry about, just air trapped in the wood being squeezed out by water replacing it.
Might be a good idea to take a picture of the light bulb with something to give it perspective - like a coin, it would be easier for us to identify it.
Also, the 100w heater should be fine for the tank.