I have been looking for a new electronics side project for a while, I design electronics for a living and have been constantly looking for a way to hook up multiple tanks easy to one big filter. I have yet to see anything. Here is what I am thinking: 1 - Electronic Valves and flow sensors controlled and monitored by a micro controller so the water comming in is the same as the water going to the filter 2 - A water level check to monitor the water level so if the valves or flow sensors are failing it will over ride those readings and keep the water between those 2 points (or if it is slightly off) 3 - Since we are adding inteligence might as well make it monitor the tempature and report it to a LCD screen, and control a backup heater or even controll the main heater 4 - Monitor what ever water propertys it can without hugly expensive sencors 5 - Keeps track of time, so you can program a timmer for the lighting, and controlls LED hoods so it can dim as the daylight dims, either threw sensing the outside light threw a sensor or simply via time 6 - Keeps track of days left before a water change is needed (soaly time based) Before I have everyone jump down my neck, this would be tested and developed on an empty 10 gallon tank I have with no fish in it. While I CAN do all this, It would take a large block of time (being a full time engineer and a full time business owner time is expensive and rare) to create, and pricy for parts since its all hand made. I do not want to go threw the hassle untill I get feedback on what everyone would think of a system like this. What does everyone think of a system like this?