Zeo uses all kinds of media and chemicals to limit things. The Zeolites consume ammonia somehow starving the tank of nitrogen and drops of this or that which are proprietary organic carbon sources to get the rest along with phosphorous. The don't need GFO because they handle it in their own ways.
Also, with ultra, vs just low/natural... what do you call driving all nutrients out of the tank if natural is called Ultra now? Super Ultra? This is not a huge deal anymore in practice, but it is important to know what people mean in talks, articles, etc. since even if they were written 15-20 years ago, the terms back then need to have meaning now.
Also, with ultra, vs just low/natural... what do you call driving all nutrients out of the tank if natural is called Ultra now? Super Ultra? This is not a huge deal anymore in practice, but it is important to know what people mean in talks, articles, etc. since even if they were written 15-20 years ago, the terms back then need to have meaning now.