the correct or preffered NKP ratio was something like 3-1-2, this was what ed rosenthal and jorge cervantes and the old growers used to use, MG is something like 24-8-16 which to me looks like 3-1-2 ???? i have used it with no problems in the past, you just have to watch out for salt buildups in soil grows, you may need to flush a couple of times. I sometimes get the impression that a lot of growers think if they pay a fortune for nutes they must be good, this is bullshit, these days i formulate my own nutes from base chemicals; i am lucky i work in the chemical industry and have access to everything i need, but my knowledge of chemicals makes me smile when i see the price of some of the nutes on offer, peoplelike AN are marking up their products by thousands of percents, cal mag for instance is just calcium nitrate and epsom salts with a bit of chellated iron, a gallon costs me about $2 max to make at home. Try MG but make sure you dilute it to rhe correct ec and test with a metre, ignore the instructions on the packet. if you have no ec metre use 5gms per 5ltr and 2.5 grams of epsom salts.