Leta put this all down to experience (or lack of it) had some hot days here 33 degrees c had some hot days here 33 degrees C. so placed a pedestal fan in there wrong idea.. dried them out , removed the fan and hoped but a week later
theyre gone. reflecting where i went wrong my net pots didnt have holes in the bottom so this would have hampered root growth and growth in general. Gutted yes . have i learnt from this yes and hopefully the results will prove it.
I highly suggest adding silica to your nutes. It will help thicken those stems be wider than a bic lighter. Armor Si from GH is what I use, but there are many products that do the same. No shortage of documentation on the benefits of silica on the web, check it out!