Man this is just me, but i HATE GH nutes. I have used them in the past and they sucked ever so much. Try boptanicare if you have any extra money. Other than that the only advice i have for ya at this time would be to get the light a little closer than you have it now. From the length of the stems, it look like the are having to stretch to get the light they need. how close are do you have the light to the tops of the plants? Also be careful with the bottle rocket sticks because they have all kinds of magnesium and sulfur on them, and can cause some nute problems, not for sure if it will, but it could.