New coil is bad, perhaps? Not primed correctly? My white teas are usually good FOOB--never harsh. I don't use nautilus, but any coil by any manufacturer can be faulty. Good luck!
Didn't really think about that. I always prime them and then let the tank sit for 5-10 minutes before starting on it. This is the second tank on this coil so it should have been primed. I'll switch it and see if that helps. Thank you Katya