I use ghe trio and find that if you use the guide on the bottle the ec/ppm is bellow what I would deam to be too much for example I use this table Seedlings, Early Sprouts 100 to 250 / ec 0.2 to 0.5
Early Vegging 300 to 400 / ec 0.6 to 0.8
Full Vegetation 450 to 700 / ec 0.9 to 1.4
Early Blooming 750 to 950 / ec 1.5 to 1.9
Full Mature Blooms 1000 to 1600 / ec 2.0 to 3.2 if I use the ratio on the bottle ...eg...on early veg when I make the nutes I may only get a ec/ppm of 0.5/250ppm so you can either stick to the bottle or just add a little extra to get the ppm/ec up ......