Think I've got myself a nitrogen deficiency going on I've lost two of my lowest leave now the next two are yellowing and the leaf stems are turning red. I think it's down to switching to bloom feed too fast and completely stopping veg feed, to counteract it I have started feeding it 2ml of veg feed only per litre of water, I'm going to do that for another day then introduce bloom in slowly but I'm going to do just veg for two days to boost the nitrogen. What's the best way to bring it back to health and have strong green leaves ?