Do I still need to add liquid fertilizer?Updated a month ago

Aquatic plants take up nutrients from both their leaves and roots. Relying solely on substrate feeding will deplete the substrate more quickly, and water column fertilisation allows plants to bypass root zone problems, such as when plants are newly planted or replanted without an established root zone. 

In aquariums, water-soluble nutrients are easily removed with water changes (which also remove organic waste and other contaminants). Dosing liquid fertiliser replaces lost nutrients at optimum levels.

We recommend the dual approach of feeding plants from both the water column and the root zone for the most consistent results. This makes a big difference when attempting to grow more difficult plant species and to grow plants to their best form.