cr500_af;610525 wrote: The prevailing opinion seems to be Ebo Jager (which is now owned by Eheim, so the name doesn't include "Ebo" anymore).
I've had trouble out of Stealths (either dying early or leaking voltage) and a Hydor Theo (thermostat not stuck, but set on 77 heater water to 93).
I've been using Aqueon with good luck so far.