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

Dimensions (Ø x h) mm 220 x 300 Poids net kg 1

refer to the assembly chapter

Fonctionnement uniquement avec rallonge de buse

PVC TEE TO GLUE 45 DEGREE 63 MM

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