Refill pack of Sus-tee water checker core. Pack of two.
Environmentally friendly and economical.
The inner core of the Sus-tee is made of natural fibres and can be consumed by micro organisms. The state of the soil is a factor in breakdown, but it can be said that the core will need replacing when the meter stops turning blue upon watering.
Available in three sizes Small or Medium each pack contains two replacement cores.
Generally the core will last approx 6,9 or 12 months depending on the growing medium.