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If you're at week six you should bring your ppms down to around 600-800, and I would try raising the pH of your fertilized water to 6.5 a higher pH later in flower seems to solve a lot of the issues you'll see later in flower like yours for a few different grows I've worked on.

Agreed. Could be a pH issue caused by overwatering or overfeeding would be the most likely issue in my guess but hard to know without more info.

Could be a watering issue as well. How often are you watering? How much at a time?

What are you feeding? Ppm on feedings? What is your water pH? Any idea of soil pH? Climate report? My guess is an overfeeding issue, maybe you need to raise your water pH. Let me know what you've been doing and we can try and figure it out.

I'm saying there is no science that says you can flush a fertilizer out of a plant after it's been uptaken by the rootzone.

From what I've heard from local colleagues; it is mostly the guys using fish and other ocean based fertilizers. The guys using plant meals, livestock manure, and meat industry byproduct (bone and blood meal) have been passing tests fine. If that offers you any hope! It is pretty grim out here...

I hear you...but your clothes metaphor is a little off my friend. Think of it like this; does a cattle farmer give their cows only water for their last two weeks of life so we don't taste the cattle feed in the meat? You can't flush out fertilizers from a plant, they have already been up taken...

Get that rh up my friend! You're way too low.

Flushing is a whole other conversation. I can say professionals don't flush to flush...They reduce fertilizers in the last two weeks to create a sundown or dying effect on the plant...this makes it use the last of its resources in one final push while ripening. You can't "flush out" the...

^^^^ different maturity of trichomes can produce different highs, and there is some preference involved. Cut early when you first see a cloudy trichome to get a straight up head high, lots of rush, good stone for doing stuff. But the high will last maybe an hour, two hours tops. Cut when they...

A small pump pulls water out of the rez and into the chiller, then a hose from the chiller is fixed to the rez just above the water so that the water is breaking the surface of the rez when it comes out of the hose. That's all you need. We used to do air stones and all this other stuff to "add...

Those are definitely amber!

Cut em! Flushing is for toilets.

The chillers are for the fertilized solution. R/O filters fill up a 1,000 gallon storage rez; that rez fills up a 250 gallon rez where fertilizers are mixed in if necessary. The chiller keeps the water at 65 degrees in case it goes up a couple degrees while running through the irrigation pumps...

Cut it as soon as you see any amber!

I'm honestly surprised that nirvana and their "blue mystic" are still around. The seeds they sent you are probably from the same batch I ordered back in 2009 . It's a garbage strain anyway you're not missing out.

I had some phenos from nirvana back in the day that I liked! I just think when it comes to them you might as well just get the random pack because you're not going to get what you picked out. Lol.

The copper issue isn't anything I've seen personally. But I can definitely understand that being a concern. My company uses chillers and our products go through state tests for human consumption and we haven't had any issues with heavy metals; copper or other. You shouldn't let your water get...

The key thing you want to do is maintain a water temperature between 65 and 68 degrees so that the water will hold the oxygen. Anything airstones, vortex, or similar type thing is going to raise your water temp. You don't need all the bubbles and wild water movement. Something just slightly...

Nirvana is a shitty seedbank for consistency. Buy 10 seeds of the same strain and you'll end up with 10 wildly different phenos.