Review on Eheim Thermocontrol Heater Black AEH3638090 by Denise Smith

I use an e250 in my 40 gallon reef cube. I have a Neptune Apex that can control the on/off temperature, but it's not necessary. I set the e250 to 79 degrees on the manual dial and my temp stays between 78.7 and 79.1. This is the most accurate heater I have ever had and the most consistent in very precise temperature control. The ultimate heater! Very little condensation may be seen on the bottom or center of these heaters. It's not a leak, it's a sealant that Eheim uses when assembling the heater. I've used every titanium heater you can use and they all broke very quickly and disabled my GFCI socket. After this E250 I never had a problem with GCFI again.