ph is

Growing CKS NL Auto Fem (Day 37) in soil. Just tested pH 3 different ways. Dr. Meter S20 4 in 1 reads 5.0 (unreliable imho) Patec pH meter reads 6.0 (new) Environmental Concepts soil test kit reads 5.5 (new, should be the most accurate) Soil is Fox Farm Ocean Forest. (Clay pebbles...