FastBuds - Pineapple Express CMH grow

What a pleasure these Pinapple are to grow. I couldn't be happier with the way they are filling out the scrog net. My only question is how bushy is too bushy? I've had to trim out a serious amount of undergrowth and large central fan leaves. I think a combination of great genetics and the complete spectrum the 315s output is causing the canopy to be so so dense. I'm just hoping the buds fatten up too! I'm trying to leave them alone as much as possible and I'm no longer tucking them under the net. I'll leave them to recover from today's defoliation and do some more plucking next weekend. I've got a feeling this tent is going to look very different in 7 days time! Now on everyday watering. Keeping the EC below 2.0 and fluctuating PH from 5.7 to 6.1 throughout the week to uptake as many nutrients as possible. Mid week edit: Please check out my last 5 photos added at day 52. One of the 2 Pineapple Express I have in the tent is looking really tired and droopy. I cant seem to figure out what is causing it as the other Pinapple is happy and praying. I also have 2 Six Shooter and a Cream Cookies and both of those are happy and stacking on the bud. Temps are solid at 29 degrees light on and 21 dark. Feeding when required. They just look like they are lacking something. Some of the oldest fan leaves have brown rusty patches on them too. I've given each plant a Biosys Microbe tea today in place of a regular feed. Ive also emptied and scrubbed out my water tank and watering can. Hopefully that brings them round but any suggestions would be greatly appreciated. Day 53, I've turned the blurple LED off in the centre and also reduced to 18/6 light cycle. They just look so lifeless. Almost like they are sick of the light. If she recovers I'll try turning the LED back on next week.