Thanks once again bonbon. I've bought another fan now so have an intake and exhaust which keeps the temp at about 25oC on a hot day, so that's a good improvement. Humidity is still around 30% though, so I think I'll have to buy a humidifier for the final stages of flowering. So far though, I think you advice has been excellent
I don't suppose you're able to post a link to a decent page regarding the major, macro and secondary nute problems, as I haven't read about those classifications before? Thanks in advance if you can.