It looks to me like a little mag def. The reason i say this is cause the leaves are dark in the middle and get lighter towards the edge. This will happen if your phd water is 6.4 and lower. I use FFOF also and havent had any problems during veg so thats why im questioning the ph. If i remember right molasses will drop the ph? Try watering with 6.8 the next couple waterings and see if that helps. Im just guessing here so even if i am wrong raising the ph a little wont kill anything haha

Also, was the hydroton soaked in phd water before you put it on top of the pots?
pushit Reviewed by pushit on . Sweet Deep Grapefruit - Showing Defficiency or Stress Three plants are going strong. One is a runt. Two are showing signs of distress or deficiency runt and one other but runt is the the worst of the two. They are only 3 weeks old so the FFOF should be buffered and nutes in soil should be sufficient. I gave them molasses 1 time. Other than that just straight water. Note that the hydrodon sits on top of the soil. It helps defeat insects, prevents the soil from be disrupted by water stream, and looks good... I am wondering if they want a little Rating: 5