Mexico is a lot different from America in the electrical system. I had to buy my own transformer which was very expensive but gave me a better rate as usually everyone else "shares" the expense of the local transformer with an additional charge on their bill.
My average bill is 520 pesos which is about $30.00 so the cost is low, still, Mexico does not have the money or equipment to respond to a large scale power outage that America does. Still it took 5 weeks to restore our electricity after Hurricane Rita and this was with teams coming from several states to help. I can only imagine how long it would take here to restore the power after a major storm so koi are out. We do lose power often but usually not for long.
Goldfish will be our choice due to the electrical grid and yes Gloria wants a "cascada" or a waterfall, but with goldfish it does not need to run constantly , only when we want to enjoy it.
Thank you for the welcomes back, I love our home in the mountains of Mexico but I am currently running a job in the states for a while, the house took twice as much to finish as we were told so I am padding our income for the next few months.