Question regarding feeding my plants, firstly I use filtered water I put recommended nutrients in then ph the solution to 5.8 to 6 (I’m using coco) but when it ppm or EC it is only showing 28
When I test the water before it’s filtered it show around 380 PPM
Why once the water is filtered and nutrients added is it only 28?
Can only advise what I should do? Do I gradually add more nutrients to bring it up to 600+