Thank you so much for the quick reply! Mine was over flowing like crazy! So I unplugged it. But I did add an air bar that is producing quite a bit of extra oxygen. I also have a power head and a gyre pointed at the surface. Do you think that will be enough?If you can run it without the cup so the water goes back into the tank, that is best to keep oxygen up. That's what I did, though mine did not really overflow much.


) so we can also provide quantitative data on tylosin and several other related compounds.