Ok, I have a 125 g. saltwater setup with a a 50 gallon refugium. I have alot of feather calurpa growing in the refugium and my heater sits in one of the compartments. Yesturday I was sitting here in the fish room pretty much all day. I noticed the temp in the morning at 79.5. as the day went on the temp started to rise. At about 7:00 pm, after a little panic I decide to unplug the heater when the temp got to 84.3 degrees. I thought I had finally experienced a broken heater. So, I went and got out one of my other heaters I use for my mixing water. I set that heater at 77 degrees and all looked well. I woke up today to find the tank at 86.6 degrees. WTF is going on. This other heater was workinf fine. Anyone here have this issue? There is no forseeable reason this would happen that I can think of. I didnt change anything recently to the tank. Why is my water heating up so fast. I did unplug this heater also and the temp is now dropping. Any ideas out there?
