I ordered a heater element. They had it on clearance $33
It is normally $159. It is a commercial heater.
Immersion Heater: 304 Stainless, 1kW, 6" Hot Zone, 240V, 11" Length
I am going to have many ways to heat the fish water. This will allow me to heat the water with solar power.
I will have my vent free natural gas closed loop heater.
I will setup a solar collector to heat the fish water.
After this project I would like to try my hand a hacking a heat pump to heat the water. I have a small coke machine that has a good compressor that might work well for this. It will be fun keeping this project fish safe.
Here are today’s tomatoes.