I need to buy an additional aquarium heater for my 75 gallon and I wanted to know what everyone is using? I tried to go off of Amazon's reviews and based on that they all suck lol. I believe I'll need two more 150 watt heaters. Right now I'm using a Eheim heater and have always had great luck with Hydro Theos but the ratings are poor. What is everyone using these days?