The 7094 would only be available used maybe on Ebay or here, they are no longer made. I would get the 7095, you cannot coordinate two single controllers the same way, they only can pulse the pumps, by the time you buy two controllers and two photocells you are more than half way to the 7095. The pumps work without controllers so you can just slowly piece it together and their may be a long wait for the 7095 because we are already very far behind.