I don't know that I made any indictment of long term quality. I was providing my experience with the jagers in a similar size tank to his. I also don't run them on the built in controller.2 year problem free is no proof of quality as every heater ought to last at least 2 seasons. Two 300 W Jagers for 125 seem to be hazardous if they get stuck in summer. I use only one 300W in my 125 and I leave the AC on in summer vacation to prevent overheating from stuck heater. Jagers recommends lower wattage than comparable brand.