This replaces the pod with pumice that holds the starter plug normally. I started using these since I was getting tired of replaceing the pumice stones everytime I restart my setup. Also it helps to reduce algae growths since there is less water surface exposed to the sun.
I made a 4 plug holder version to start seedlings in the tray.
Added a version with a smaller brim to be able to use the
Nursery Cross by fastriker.
For commercial use message me.
try to print in white or light color filmament, I printed at 0,25mm resolution to have a short print time