Anyone who has fish in a tank has come up with various schemes to make water changes easier, but I have always wanted an automatic (or as close to automatic as I can get) water changer.
Running just a 90 gallon tank for the past seven months I've come to dread the weekly water changes, but that now is a thing of the past:
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This is a temporary switch for the hot and cold water valves installed today on my water heater <g>:
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Hot and cold running water right to the tanks, and what a luxury it is!
Of course, I couldn't just stop with a few switches and lights:
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This microcontrolled device has been in the works for quite a while, but haven't had the time to finish the project, but now with the valves installed on the water heater, maybe soon?