So my frogbit hasn’t been doing well over the past week, and I haven’t been sure why.

Until today, when I changed the water in the tank and, huh. Feels kinda chilly—


Both the heater and the filter were off. No idea how long for, but the tank was down to 20°C. Ack. Maybe I need to buy one of those electric thermometers that beeps if it gets too cold…