A few days ago, looking at these data graphs, we noticed that Co2 levels would rise to about 700 ppm and then flatten off, holding steady at this value. This is NOT GOOD for the mushrooms as it seems to indicate that they stop producing CO" when the atmosphere reaches this level and presumably stop growing as well. Fortunately, there is a fan in the system, which we then started to use and monitor the results. Since the outside temperature is about 1 degrees C on average at the moment, it's important to minimise the airflow into the container so that there is just enough airflow to moderate the CO2 levels and no more as otherwise heating costs would escalate. We're keeping a careful watch on electricity consumption and will need to make a calculation to assess how many mushroom blocks are required in one batch to justify the heating costs or if a false wall should be installed in the container for the testing stage.

Data from the mushroom container can be seen live at https://www.goatindustries.co.uk/amcharts/temperature10.html .... it makes excellent viewing and is better than a lot of stuff on Netflix.

.... Could be something to do with the air filter we're using: