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Have you talked with a physician you trust? Doesn't need to be the psychiatrist that prescribed what you stopped taking. But would be a step in the right direction as opposed to asking about it here from anonymous people over the internet.

It depends on variables like if you use RO or distilled water, the nutrients you use, growing medium, etc... I've never had a cal/mag deficiency issue in my situation. But that's why I use half-tap water instead of full RO or distilled water. My tap water has more than enough minerals in it for...

I have basic/hard tap water. I've taken to using my grocery home delivery service to deliver up to 12 gallons of distilled water (in 1 gallon containers) with my weekly or bi-weekly grocery shopping. I mix half tap water and half distilled water for use.

A PAR meter. PAR = Photosynthetically Active Radiation.

Might want to get your RO system checked if you are needing to adjust the pH of it. RO water should read as about 7 pH and have nothing in it that can be adjusted.

The white residue is not chlorine btw (which relatively quickly will escape as a gas from water). The residue is most likely minerals and of those minerals, most likely calcium. If you happen to have a pH meter and it shows your tap water is basic - you can be pretty confident that it is...

I've heard about people doing it this way before to avoid using plugs. Thanks for sharing the pics - looks like you have it down and no issues. Any idea of the material of the shoelaces? Was leaning towards trying to find undyed cotton.

Take a sample?

Looks like they recovered fine. I've grown a photoperiod strain of NL - it also was a bush of a plant, and very hardy/forgiving.

Have to say I've only had good experiences with Seedsman. Seeds arrived in the breeder packaging. 100% germination with everything from them so far.

Actually, nature does exactly this: Nitrogen fixation occurs naturally in two ways: biochemical activity in certain types of bacteria and through lightening. A flash of lightning unites nitrogen with oxygen, setting off a process that creates nitric acid. When nitric acid falls to the ground...

I honestly wouldn't worry about the microbes toooooooo much when it comes to pH up or down. At the amounts it'll be diluted to in a nutrient mix that's safe for the plant, it should be safe for microbes that are beneficial to the plant. For pH up, potassium hydroxide is common. It breaks down...

Define what you mean by 'organic'. Not trying to be pedantic by the way, but the term means different things to different folks. But a long story short, pretty much anything you use that is organically derived like lemon juice: microbes are going to consume in short order and make whatever you...

I have a few people I donate to that have serious and chronic medical conditions. Nothing wasted. Which is a great feel-good thing for me and a motivation - but I do that because I can as a result of it being a hobby that I enjoy. I did use to have a business selling cactus (hydroponically...

Would you believe it if I said I haven't had any desire to partake in any cannabis product in over a decade? I've never sold anything I've grown either and probably never will. I think I'm one of the few that just grows purely as a hobby.

Hah - I'm in the same boat. I'm just doing a test run with 2 plants in a 4'x4', DWC, @ 642w currently. I'm new to LEDs having used HIDs up until now. I'm planning on doing a journal next grow though once I have the 4 site RDWC system completely done for the tent. I'm slacking this grow though...

Well they're looking good so far. Are you doing a journal?

RO filtered water shouldn't have any EC (at least if the system is functioning properly). That's why you can't "fix" the pH of RO water... there's nothing in it to fix or adjust ionically. Same holds true for distilled water (which definitely shouldn't have any EC).

I like Shane from Migro. Seems to be a straight up guy and if I were in the UK, I'd probably buy his lights.

I ended up with some Dr. Seedsman CBD seeds from a promotion. Not sure if I'll ever get around to actually growing them... might just plop them in the ground someplace and let nature take its course with them.