Understanding Nitrogen in Aquascape
Nitrogen and NPK
Nitrogen is an essential element in aquascaping. It is categorised as a macro nutrient which means that it should be kept in a certain concentration all the time. It also has a relation with 2 other macro nutrients which are phosphorus and potassium. The 3 of them need to be kept in a certain ratio in order for plants to utilise them successfully. The ratio of the 3 elements is often referred to N:P:K whereby N stands for nitrogen, P for phosphorus, and K for potassium. Depending on who you ask, the ratio often varies from 5:1:20 to 20:1:15. These answers are all not wrong as sometimes the ratio doesn’t need to be that exact.
