have just looked into my tents - tent 2 is destroy...

So sad. Well, after looking through your weeks. I think I know the cause of your issues You are using nutrients that are not meant to be given at that stage of growth. And you are mixing stuff up. 1 week nirvana, 1 wk big bud. 5ml, 4ml,4ml way to much of similar nutrients. There is only a few things that help with growth. And what you are doing is overloading on 1 of the same thing but just in a dif bottle. Drop most of that. Or use it as you are meant to. Not with a week here and a week there on this and that. Straight nutrient lock. And as GrowingG said more nutrients doesn't translate into a bigger crop. If anything its the opposite. Less is more when growing. Now, you'll c I use a boat load of nutrients but I use them in small amounts and I break them up into 3 groups. My ppm stays low. I'll be dropping a load of stuff. Focus on what you have. Big bud should only be used in the 1st 3-4 weeks of flowering if I remember correctly. And nirvana is given in the much earlier stages. Also, I find things like Nirvana and big bud from adv nutrients. You have to be careful when adding these things to other brands of nutrients. Be sure to give brands that are of the same together unless you know they work. But I had issues with mixing big bud in with another brand of nutrients. Was going like yours but I caught it after a few rust spots but no doubt if I'd of left I'd of gotten that. Drop a lot of that. Stick with some core NPK +micro + calmag. That's all you need. And when you dial it in, then mess around with adding and taking away stuff. Good luck.