I really wouldn't trust X-10 for a tank. It is VERY unreliable and will turn on and off when you least expect it (especially if you live in a more highly populated area). If you go with any X-10 get the more expensive line, but it is still pretty unreliable. It wouldn't be so bad for lights, but I would never use it for pumps or heating. Trust me...my occupation is home control, and I have personally owned x-10 in the past.