2-pack refills for the Sustee Aqua Meter. Keep the meter submerged in the soil with its partner plant. When the soil is wet at the meter depth, the pF indicator turns blue. When the soil is dry, it turns white. Each pF indicator lasts about 6 months.
Two lengths: 7" Medium and 10" Large
2 refillable pF indicators
Refill every six months.
Nationwide shipping, NYC delivery and pickup available.