Experimenting with Balance
Here are some experiments you can run:
Fan angle: which fan angle lowers the temperature the fastest? You just need to add a protractor to your system, and graph the readout. What happens if you add more than one fan?
Temperature and depth: does temperature vary with depth in your tank? Is the temperature variation always the same, or does adding an air stone or fan stirring up currents that make the temperature vary less?
Temperature and fish: Do the fish (or snails or other creatures) tend more towards the top or bottom of the tank? Does that change with temperature changes?
Other sensors: to experiment with other sensors see our worksheets here.