Ok not just to dig up a old relic of a post, but to add to it, I have ordered the firecracker kit from X10 (should be here with in the week)and I already have X10 running two of my light sets. reciently I came across a post on RC about a "possable cheep moterized ball valve system"
and sence I have been trying to come up with a alternating system for current in my tank this peeked my interest. it started out with a bunch of ideas that are to far out (as most DIY's do) but then the working model came to be. it is a simple set up which was made for X10 control.
this is the
LINK for the discussion on how it came to be.
The key to this system was a way to controle the X10 so it would be a automated process and thanks to Bill-e, he has modifies his light master program (that uses the X10 firecracker setup) to include suport for up to 6 pumps. (so even if you don't want to make the ball valve you could set 6 power head pumps to strict controle for less than 50.00 + the cost of the X10 modules.
if anyone is interested in learning more about the firecracker set up or just X10 in general you can follow this link
"X-10" by regestering at this page you will get a 15.00 credit on your first order. I did this and ended up getting my firecracker kit for 37.00 including tax and shipping.
once it is here and hooked up I will let you know how I like it and such.
Steve