jauringer
Member
Euro reefs can release quite a few bubbles depending on how high you have the riser tube. If you extend it as high as it will go, then that will push the bubble column up in the chamber and they won't be nearly as bad, but it is always a good idea to be safe with a couple of baffles. a really good benifit of the ER is that it is more forgiving of water fluctuation than others. I think the optimal water height is 6-8 inches.