Hey Rob! It is commonly used to hook up ice makers from the back of the fridge to the water source.We use some at work for low psi actuated valves. I got it at LOWE'S, the whole roll (400' was $36) it is $0.09 per foot. I set them in clumps of four close to the base of a couple of logs set on the edge of a gravel bed I hope will be used for spawning. Water is now about knee deep, should be 4-5' or so one of these days.
