great setup and awesome documenting redox. congrats on both and thanks for sharing, been reading this thread for a few days now and have learnt a lot. i think it is going to be at least a decade or two before i can have enough time, money, and space to setup something similar but its in my life long dreams list.
if any consellation, you should be glad to live in the states. where i am at the prices for electricity are about 5x, gas 4x and aquarium stuff is about 7x higher.