My luck with Eheim-Jager heaters has been unbelievably poor. I originally had 5 of them and within a year, none are presently working. I just can't adjust them to regulate the temperature. The temperature ring seizes up and the button that releases the ring, if you try to lift it, will break your finger nail. Use something heavier duty (like a screw driver) and the heater will break. I'll never buy another. I also ordered 6- 300W Jebo heaters (they were cheaper as a six- pack). They all failed in short order. I've also used Hydor and they're not particularly reliable for me either. I'm sure different people's experiences vary. But this is the way it's gone for me. I've never used Visaqua or aquatops.