I add one for your list:

Dont use any metal in a res where you have a disk fogger also inside the container. Believe it or not, those medal disk foggers have an electrical current that gets passed through the device and since it's touching the water also charges the water. In fact, if you touch the disk head, while it's on and in water, you will quickly see that it can and will shock you. Since the water is electrified it begins to act like a electroplating system and draws the metal away from the fogger and put it on the metal/wire that was in your res. It took about 4 days for large pits in the fogger to start to show but it was clearly removing the metal away from fogger housing and instead plating it on the tie wire near by. Very strange and enlightening at the same time. I know how the electroplating concept works now. lol I never thought I would run across something like that when attempting to grow some pot!