Sorry for resurrecting an old thread here, but I have been doing my research and contacted Biobizz directly about my problems with my plants.
It would appear that I have been making a few fundemental mistakes.
Firstly, my watering. Biobizz advised me that watering until I have run-off, whislt using organic soil/nutes, is a bad idea. I have been essentially flushing the nutrients out of the soil everytime I watered. They advised me that the nutrients in the soil are what keep the pH in check and to add some epsom salts to help out.
The other problem I seem to have had is that because my temps are a little on the high side, and the pots drying out faster than normal, I shouldn't have been feeding nutes with every water. I should break it up with plain water and not to mess with pH up/down or lime etc.
Basically, the jist is with organic soil growing, less is definitely more.
Just thought I would put this out there.
Dazed..