ATO - Which one do I get?

[cwschoon]

I don't skimp on things such as these. Still prob going with Tunze but was really surprised when the dealer recommended Coral Box over Tunze and he sells both. And yes, the profit margin thing did enter my mind.

 

[LQT]

Go for the full size Tunze Osmolator 3155, not the Nano, and never look back. I'd have to agree with others, that the Coral Box recommendation from the dealer is most likely motivated by profit margin. To say that the Coral Box ATO (which hasn't even been out that long) is more reliable than the Tunze 3155 is laughable.