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All due respect, forget that. You turn the lights off for diagnosis. Go with the flowering spectrum. It's something I've now got a solid opinion on. I've built two lots of fixtures; one with just 3000K and and another with a 50/50 mix of 3000 and 4000K. The 3000K is markedly better for...

It's not apples vs oranges, It's just a standard priced LED fixture vs a standard CMH. Why use a shit LED as the benchmark just because it's the same price? I think the OP already knows the price of an LED is going to be a bit more than another CMH bulb, but it doesn't have to be a massive...

I'd never even think for a second about switching back to my 315 cmh from the 320w bridgelux strip build I knocked up. There's no comparison between the two fixtures, the LED whoops it's ass all round the garden I used to like my CMH too :cry:

Unless the building's in the middle of a field or a load of vegetation, most likely way they get in in the first place is on you. If there's any webbing on any plants you brush past, you've got mites on you. If you go into your room without a change of clothes and a spray down, they're in...

Iso definitely isn't an option in flower, by then it's too late and the best you can aim for is damage control. I think I already said that in my original post, if not then yes, it's out of the question in peak flower where you wouldn't want to be spraying buds with anything at all, including...

How many weeks sup?

You're close. In terms of weight and maturity, you're waiting for the calyxes to swell over the pistils. The plant won't gain much if any weight after that. That's where the last grams on the scale come from. That's it's finished weight. Looking at that last picture, I'd say another ten days...

@HortiBloom What are the exact measurements (to the millimetre) from the corner to corner? Thanks

Product won't be flagged for residual solvents because the lower foliage of plants were sprayed with Iso during the vegetative stage. A mite infestation doesn't start out with webbing at the top of plants, first they colonise on the underside of the lower leaves and they're usually there from...

Then it makes getting advice harder, because ppm isn't a universal measurement. Find out if you're using the 500 or 700 conversion scale and then find out what your ec is. If it's 2.4, then you're most likely frying your buds, which is why I asked what you NPK ratio is, because they look full...

Just to add, we've got to take the necessary precautions when working with iso, co2, ethanol, water and electricity, pesticides or any of the other potentially dangerous stuff we deal with. I expect a grower of this fella's knowledge to know how to mitigate the dangers of working in a grow room...

At 50-60% and extraction on and used in a sensible way it's not dangerous. We're not spraying 99% iso. Bear in mind the concentration. It's diluted down to a strength which won't harm plants when sprayed directly on foliage and the majority of the spraying is done beneath the canopy.

You using alcohol mate? It kills spider mites and dries out their eggs If you're thorough and regular with a 60% solution + some surfactant, you'll completely eliminate them. You can also control them through flower without worrying about residuals. You do need them under control by the peak...

That's more likely your problem. What conversion are you using? What's the EC?

Don't worry about it. You'll get even temps across your floor. You won't lose much in the way of height either. Maybe an inch total. And no need for breakers unless you're heating commercial sized floors. You can go two ways about it Google `decoupling membrane` and` xps sheets` all you need...

None of this debate accounts for root temps. The measurements should go hand in hand IMO and I think we're missing a big piece of the debate whenever we look at the two things separately. It's possible you change parameters at canopy level when you change them at root level. That hasn't yet...

@HortiBloom is that the mega plus?

That's what it is. If the heat is married with humidity, you'll get explosive growth. The three things work in tandem, heat, humidity, and light intensity. Keep that in mind and you'll be able to solve your problems a bit easier.

Need to post pictures dude. But in the meantime try this: Turn your extraction right down. Just enough to keep your air running through the filter and the smells from leaking, but low enough that it gets really warm and humid. Post back what happens

Thanks for helping me get there dude. I appreciate your help on the build man, big time. Same for everyone else who chipped in.