Pineapple Chunk Barney's Farm

When i add Cal-Mag ec goes 3.0 i think 3 is too high? Can someone verify that for me, I don't see burn at leaves so it might be ok? There has been long time some brownish color on 2 leaves but they are oldest leaves of plant and have had those many weeks even ec was too high. Or should i drop come nutrient amount or what should i do? Everything is still going good and now the stretching is starting