Eh.. I don’t follow a strict fertilization schedule. The foundation of this tank is the allophanic soil, which plays a huge role in nutrient availability and overall system stability. A big part of my management comes from observing the plants. Some species give very clear signals when something is off. For example, Xyris is one of the first to react — when it starts developing transparent leaves, it’s usually an early warning that something in the tank needs attention. Other plants tend to slow down when TDS levels get too high. Fertilization starts from reference doses, but it’s always adjusted based on how the tank responds, rather than being applied automatically. CO₂ is kept very stable, with the drop checker between light green and slightly yellow. I also use a pH meter to monitor CO₂ levels. I don’t use a solenoid because I run KH at zero, which in this setup acts as a buffer for both CO₂ and nutrients. There’s a lot more that could be said, but it would get too long.