automatic water change

Hi, I've been thinking about and planning a fishroom for a long time. About a year ago we moved into a home where I plan to stay for a long time. So it was time to put the planning into action and turn my garage into a fishroom! I thought I'd share with you some of what I've done. My hope...

This came off of an automatic water change system on a tank that I bought. I saw it up and running prior to purchase and can vouch that these work perfectly. The controller looks brand new, although the previous owner removed the grounding pin from the plug. I would be happy to replace the plug...