As I understand it, AFR is calcium formate based with magnesium and trace elements. The formate causes a carbon effect which lowers NO3 and PO4. I started using it 2 weeks ago and now my nutrients are down from 5-10ppm to 1ppm (or lower…very light shade of pink with Salifert test, when viewing from the side). PO4 has always been at trace levels due to rock and sand absorption. I have been feeding heavy frozen mysis and Rod’s as well as pellets and flakes to try to keep up with nutrients. I have been dosing NeoPhos for the past several months and have NeoNitro coming in a couple days. What I’m wondering is if this will eventually find an equilibrium to where I won’t need to dose either? The tank is a 25g mixed reef with the majority of corals being SPS. It is currently stocked with 5 fish and various snails, hermits and a shrimp. I’m dosing 3ml of Reef Energy AB+ daily to help ensure the corals don’t starve. They are all growing pretty quickly, though some of the zoas have adjusted and somewhat transformed (smaller polyps with shorter skirts) which I’m assuming is due to the nutrients being so low.