EI Method All-in-One Liquid Fertiliser 500ml

The Estimative Index method relies on deliberately overdosing nutrients to ensure no single element ever becomes limiting, then removing the excess with a 50% weekly water change. This all-in-one liquid formulates macro and micro nutrients at the high concentrations the EI method demands, simplifying the three-bottle macro/micro split into a single product.

By combining NPK and chelated trace elements in one solution the product reduces the dosing burden on busy hobbyists while maintaining the nutrient saturation that drives fast, healthy growth in CO2-injected aquariums with high lighting. The formula is calibrated so that three doses per week at 10ml per 100L keep all nutrients at target EI levels.

It is most effective in high-tech setups where CO2 injection and strong light already support rapid plant uptake. It is not recommended for non-CO2 tanks where lower nutrient demand can lead to algae if EI doses are applied.