Thanks for the reply aqua. As i know ammonium sourced calcium does not exist. Calcium nitrate is the only available calcium source from mineral fertilisers. All branded CalMag fertilisers use it like : GHE calimagic, BotanicareCalmag plus, Advanced Nutrients Sensi CalMag and etc.. Also their Magnesium comes from magnesium nitrate(in every concentrate liquid formulas where Cal nad Mag are together both are in nitrate forms) . So i opted for mag sulphate(epsom salts) not to overdo nitrates. In NPK dry ferts numbers are high becuase they are simply dry , just needs to be diluted to desired ppms. 20-20-20 is 20-8.7-16.6 in elemental form , manufacturers use oxide forms of P K . Multiply P% by 0.436 and K by 0.83 to get pure elemental ratios. Why is pH not in a good place ,though? What ratios of NPK(please mention elemental or oxdie form) do you recommend for veg and flower for autoflowers. At what ppm should i feed and should i feed every watering or every other watering .
Yes this is why I was suggesting using the 20-20-20. It's confusing at times because of labeling.
Basically a 2-1-2 or 2-1-3 is what I like. So a small k boost is not a bad idea. Potassium silicate is a nice addition but you will need to PH during mixing. A bit of a benefit of K and plants love the silicon.