Sorry, not sure this makes sense. You’re saying the water feels cooler, and thermometer (I assume you mean heater) is hot, but no light is showing. If it’s hot, how can the water be cold? What was your temperature reading from your thermometer?Omg the water is much colder sthan normal. Thermoter is hot but no light showing. Oh god
I won't, but disappointed as I care about each and every fish!Silver lining, you know what the issue was and it’s been easily rectified.
Wishing you the best of luck moving forward.
Don’t let this discourage you, we all make silly errors in this hobby that we don’t mean to.