Set de mousses BioPress 4000 - Oase UTILITÉ_NITRATES it is because there is

it is because there is a shortage of carbon dioxide (roughly "CO2") in the pond

depicting a little boy pouring water from a jug

Fonctionnement uniquement avec rallonge de buse

des précipités organiques et des boues durant tout l'hiver

The Koi then have optimal growth and more attractive colours

Set de mousses BioPress 4000 - Oase UTILITÉ_NITRATES it is because there isFilter sponges are the heart of a filter: they not only perform classic filtration, but also serve as a habitat for microbacteria. This small biological oasis in the filter sponges ensures the recycling of toxic substances generated in the pond: in the blue sponges, the toxic substances are transformed into harmless but invigorating substances for algae (nitrification), which are then transformed into natural gas in the black sponges