The green slime you have on your
rockwool is called Algae. Photo
contributor Oldpink
Algae needs light and nutrients to
live, it will spread to your reservoir and will block
feed lines. Because of rockwools unique vertical
'tube-like' structure, which takes up nutes via
capillary action, and pulls air into the medium as the
nutes drain outward, a heavy buildup of algae can
effectively block this breathing action. To prevent this
from happening, use light-proof and water-proof material
to cover your rockwool, for example black/white panda
film or thick black bin liners. |