As I had stated before, I’ve done this kind of stuff countless times before, and with bigger systems with more delicate animals. So I feel like I have the routine down pretty well where I have virtually no loss of life.
I was pretty floored when that part of the project went off the rails.
So, here’s what happened: The client is out of town for the winter. Part of being gone was turning down the thermostat. OK. I knew this was going to happen, so I added a 500w heater to the sump. This tank has never needed a heater before, and it seemed like overkill.
Now, the therm ended being turned down to 62! But a 500w heater in 200 gal should be able to hold the fort down. However...there is a air filtration system that they installed in the filter room years ago to help with ventilation and humidity. It pumps filter room air directly outside:
For some reason...and maybe I never noticed when the house was super warm...but there is cold air coming into that room from outside. It’s coming right out of that vent.
When the initial Sinularia die off happened, it had been extremely cold that weekend. The water felt pretty cool, and the house felt pretty cool, but when it’s that cold outside, you never really warm up. My guess is that it got down below 70.
The real fun began last week during the polar vortex. Our highs in Chicago for 3 straight days were 1, -15, and -2, with lows between -5 and -22.
That 500w heater didn’t stand a chance, esp with cold air pumping in, so I added an additional 300w heater, and that was only enough to keep that water around 73-74 max. I had stuffed a towel into that vent, but you’ve seen pics of the house...it’s all windows, especially around the tank. That cold air was just pouring in, and then just sinking into the basement.
Anyway, we lost a fair amount of stuff, but not all of it. Some of it has held on, and I’m nursing it back.
Trying to find the silver lining...I think what would have happened is, had I not taken the tank down to reboot it, everything would have stayed in the tank. The water would have gotten super cold (because the 500w heater would be trying to warm 450gal instead of 200), it would have wiped out the Sinularia, and then it would have wiped everything else out because I would not have been here. And I would be dealing with a dead tank that wasn’t redone and vastly improved upon, which would have been far more depressing.