help with ppm

hey guys any help would be appreciated,
growing in soil plants about 2 months old in vegetive stage. (dont have any pictures at this stage). i have a 150L reservoir im doing half what the bottle says works out to be 1m per litre. 150m a & 150ml b. and my ppm is about 300. i feel anymore nutes and they will burn but why is the ppm so high, when i test the run off its 900 how is this happening.

so do i raise the ppm up with more nutes and risk burning or is 300 fine?

If u are putting in 300 ppm and 900 is coming out and you are in soil i would give water only the next few feedings. Your ppms are so high because your getting nutrient buildup.