What do my plants need? It's 600 watts hortilux hps bulb, reusing soil with perlite. Using BioThrive veg, Cal-Mg.
Ph levels? I believe your looking for 6.5 in soil. Also this is the hydro section, might want to try sick plants or the soil section.
Reusing soil? Thats a no no. How much nutrients are you using? Your plants are pretty small and should be fed very minimal amounts in soil