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EC/CF in a Rockwool Slab System

If conductivity begins to rise in the slab it will be an indication that irrigation is either too infrequent or too short. It is necessary to trickle nutrient into slabs for just long enough to get a 10-15% run off. Your timer should be adjusted to provide this amount of nutrient at least four times during the daylight period. More frequent irrigation may be beneficial. Regular checking of nutrient EC/CF values from within the slab itself with a syringe is the most important routine for the rockwool grower. If the conductivity begins to rise then the grower will need to increase irrigation to ensure run off at each watering cycle. If conductivity remains high then it is a simple matter of flushing the slabs with water.

How to Measure EC/CF
EC/CF in a Rockwool Slab System

Products

TRIDENT Meter
EC/CF Meter
CF Standard (CF28)