What's your experiences with a calmag or similar product..

i know..cal mag diff..but i put some in the beginnig guess i gotta always put it with ro water since its lk 20ppm lol but I posted on here to get more responses..what's the best or your experience with non organic dwc grows.. Thanks

Its only the oldest plant with the old leaves the new leaves are starting to yellow..more micro?

Ppl say it looks fine..Idk tho..lol

Can u foliar feed any calmag products was another ?