Thanks for being more courteous Cuzza. I appreciate your input. I understand completely what you are saying. There are many risks - but how are they different than every day normal risks? If we lose power tomorrow - everyone's tank is running up into the 90's as their house heats up from lack of AC. Same in the winter - we all mostly run on electric heating - if the power goes out - your stuck with a 60 degree tank.
From what I can tell - my risks that are outside of a normal operator in a house that would put the lives of my stock in danger are broken equipment - like a failing chiller(s) or heater(s). those risks can be mitigated via redundancy. The one risk I cant mitigate is neighbors spraying chemicals, pesticides, paints, etc.
While John mentions an air scrubber - that would mean the entire aquarium and sump would need to be air tight (for the most part). that wasn't part of my plan - but I may consider it.
You're welcome. That was my bad.
I agree we all have that risk, but I think the risk of losing power would have a greater effect on a tank outdoors than one that was sitting in a comfy 75 degree home. At least being inside buys some time to rectify the situation with a generator.
So looking at the pictures why couldn't you lose the couch against the wall in the living room? Especially if it's just you an no wife to demand otherwise.
The simplest thing to do if it must be on the porch is convert the porch to a Florida Room.
However, if that's not an option, looking at a different picture of the porch... Perhaps you could have an air tight tank on the wall with the clock and depending on what's on the other side of that wall keep all of your life support in a bench/chest/stand inside (would make maintenance easier). This would also make it much easier for you to seal as you would only need to contend with the top of the tank and the plumbing going through the wall. You could probably seal a canopy on there very easily with some sort of diy gasket or rubber and have it on some sort of decorative pulley to lift it so you could work inside the tank. If feasable, you could also run some small flexible dryer vent duct work from inside and deliver fresh ac to the tank through the wall and canopy, finishing the inside with some drywall work or a small fan covered by a vent cover so it wouldn't be unsightly. You would need a check valve on the canopy to release the air pressure. Also, like John suggested I think LEDs are the only play here.
And like you said, equipment redundancy and an Apex on a UPS to alert you of a power failure with a generator on the ready. And speaking of generators, Mobil on Alt 19 and Curlew sells ethanol free fuel. I do not put anything other than ethanol free fuel in all of my small engines and boat.
Just some suggestions to make it work and keep everything alive for a long time. An interesting thread to say the least. Never would have thought of subterranean climate control. Very interesting idea, John. I know they do this for ac units and it would be perfect for a tank, minus the jack hammering of a concrete floor.