Confirm Mag deficiency

The instructions tend to say one drop per gallon. Isn't 4 ml way too much in a bucket? There's 5 ml in a teaspoon so you used 4/5 of teaspoon. That sounds like a lot of superthrive.

maybe the older bottles but the new ones do not. it equals to about 1 ml per gallon now with their new mix. my guess is so they would sell more they dilute it a bit and say add more. i can post a pic of my bottle if youd like. so i pit 1ml less than recommended