Today is not an overly sunny day it is 80 degrees in the greenhouse and 50 outside. I have the heat exchanger running to test it out.
The fish water is 65 on the top and 61.5 ¾ the way down. One hour running it raised the water temp 67 on the top and 62.5 ¾ way down.
The fan uses 107-108 watts the pump is run off 12v car battery I hope to mostly charge with a solar panel.
The fish water was 65 F four hours running it went to 68 F. I can’t wait until it is a very sunny day to run it.
Total water in fish tank sump tank and the grow bed is about 1,000 gallons
My pump is getting warm so I called the pump company and the duty cycle is 30 min an hour. It seems to be working I am going to need a different pump.
Here is my new sign.