I have a system set up that will automatically change the water on my fish tank. It works well and I am using wires in the water as electrodes and have them plugged into the analog ports on the arduino. It senses water fine but the problem is that the wires disintegrate and every metal i have tried …

Water level Sensor

system July 10, 2009, 7:40pm 3

You could possibly try a pressure switch.

If you want to encourage cephalopods, don't use copper.