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Why am I posting all of this? I believe everyone willing to learn should know how to grow. The point I hope to get across is that the process of starting and continuing in living soil is simple, affordable, and rewarding. Eventually, over time, this living soil will continue to thrive so much...

The high K intimidated me for years. I picked some up this year because my outdoor plants had that Mg def like OP's plants. Foliar feed wasn't practical, too time consuming, so I took a chance on langbeinite. Worked like a charm and saw improvement in days.

Pulled pretty much everything out of this bed, the tomato is actually gone now. Tons of radish and carrot sprouts have eagerly taken their place, hoping to get some spinach and lettuce there too but we'll see. Another bed that gets a little too much shade from the large mesquite tree in my...

Lots of stuff going on, this is a very small space but this has quickly become a part-time job. Veg room photos from yesterday. Looking on schedule for my 11/1 deadline to have some of these 2g pots outdoors. They're a bit small still, price I paid taking as many clones as I did. I don't...

Flushing won't help much, you likely have no issues with excess, only deficiency. Flushing will make things worse, IMO. Just let it ride until the langbeinite arrives. Shutting off the CO2 and dimming the lights down all the way will help in the meantime, help minimize the stress. Don't...

Waiting until you look at those to make a move would be best here, IMO. You may not have to change inputs too much, if at all. My thinking is that extra shot of dolomite lime you gave the tomato SIP is why you saw this residue, and you're not likely to see the residue in the indoor SIPs since...

Oh, okay, my mistake. Thought you'd run the equipment longer than that. If you're absolutely positive you have no bugs, and have pH tests to confirm there are no lockouts, it is likely the Mg/K deficiency. The DE/LED lights end up using more light because of spectrum, so more photosynthesis...

Seconded. The only time I've had plants look like that was due to out of control gnat population, or my well water fucking with my pH. I'm leaning towards gnats on this one. Spots on the leaves combined with the other symptoms usually means gnats. Something is fucking with your pH for sure...

My mistake. I must have glanced over where you said "Bit of light burn but first time using LED" earlier in the thread. Definitely what's happening here, other than that, no issues and keep doing what you've been doing. Just gotta raise the lights a tad is all. You clearly know what you're...

Depends on the top dress, but 4 weeks is a pretty good average for those all purpose and bloom organic blend mixes. Naturally, certain things take months to years to decompose, but I'm guessing you're asking about those blends yes? Check the bag, most say re-apply monthly. However, for bloom, I...

Very incredible work. I don't know why I never saw this thread. You look like you're only a few cycles off of having yourself a fully self-sustaining closed loop system. Your results and photos certainly reflect that, you can practically feel and smell the life just from the photos. How does...

That extra lime in the tomato SIP could be why that SIP is the only one showing residue where the top dress once was. I can't really think of any other reason it would be there, but not in your other SIPs. Could it be possible that the residue in question is actually that extra shot of dolomite...

Baring extreme and niche circumstances, we typically do not have to concern ourselves with pH in a living soil. The only time we should be concerned about pH in a living soil is if our water is hard, that's pretty much it. I'll get into that further down in the post. tl;dr below. The only...

With Blumats or SIP grows, top dressing will work just fine. The water will still make contact with the top dress, and will eventually decompose. In fact, the top dresses will be more effective with SIPs/Blumats because you aren't losing whatever water soluble nutrients in the top dress via...

Yeah, that white mold will appear when plants are overwatered, or sometimes the mold will cover a top dress. Usually, white mold isn't a bad thing, and is a sign of having good fungi in your soil to the point where it is manifesting in the form of a mycellium "web" so to speak. If you look up...

And my sincerest apologies if I came across as contentious as well. Fungus is a definite possibility, however, the question is what would suddenly cause fungi to appear at the exact location of the top dress? That never appeared there before? And, OP pointed out specifically that the...

I won't fight you on the long winded part, something that I've been working on throughout the years, clearly unsucessfully. Wrong though? Not the case. If this were a fungal issue, OP would be experiencing this phenomenon throughout his entire substrate. Furthermore, it would be expressed...

Correct. Not much calcium is water soluble, this is especially true when it is in carbonate form. This is why my first thought seeing this chalky substance was Calcium. OP's tap water wasn't a direct cause of this, but definitely played an indirect role. 200ppm water typically does have both...

Yeah, definitely Calcium with that pH. Exact same color I get when I pH my tap water from the well. Now all that's left to do is wait the 24+ hours after applying the vinegar, and seeing if the pH buffers back to alkalinity or not. Based on what I'm hearing, it seems like the residue is most...

Looks kind of like Calcium sediment, but I'm trying to figure out how that would even make sense. Looks just like what you'd see in a bag of gypsum, or the scaling on my faucets. Got a few questions to ask to hopefully get an idea of what it is, but I have a theory. You mentioned this was your...