Hello! First post!
I have a little bowl, just under two gallons that I have a 15 watt Hydor heater in. During the day the water temperature has been between 80 and 70 degrees F so I've only been plugging the heater in at night. When I check on the bowl in the morning, sometimes the thermometer strip is at it's max (86F). So I was wondering if the 15 watt is too hot and whether I should get a smaller 7.5 watt.
Also, are there any under gravel heaters that are also self regulating that would fit my bowl?