I think it's just about impossible to have a zero impact tank, but I think if it was a small enough tank, you could keep it very minimal. There are many powerheads that only use a few watts - the Hydor Koralia Nano for example only uses about 4 watts. You could put a small LED light over the tank that won't use much power - this one only uses 12 watts. The only thing that will really draw much power will be your heater, but they do make them as small as 20-25 watts for tanks that are around 5-6 gallons.
You won't be able to do it with zero electric, but 30-40 watts won't even be noticed by your company - that's the equivalent of 1 fluorescent tube out of the hundreds that they probably run. It will likely even be less because the heater shouldn't need to run 24/7. And if they are too worried about it, tell them you can pay them the roughly $3.50 a month that it will cost to run it. :sarcastic:
You won't be able to do it with zero electric, but 30-40 watts won't even be noticed by your company - that's the equivalent of 1 fluorescent tube out of the hundreds that they probably run. It will likely even be less because the heater shouldn't need to run 24/7. And if they are too worried about it, tell them you can pay them the roughly $3.50 a month that it will cost to run it. :sarcastic:
