Grodan plug-in trays of 150 units BOX of 18 trays each
The GRODAN rockwool starting block is mainly used for cuttings and fits into the starting block with a small hole (20x20mm). Grodan rock wool has a neutral pH value and should be soaked and rinsed with pH values around 5.5 to 6.0 (never below 5!) Before starting breeding.

Suitable for
Starting block 7.5×7.5×6.5cm small hole
Starting block 10x10x6.5cm small hole

Small cube 20x20mm