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50lb bags of fertilizer. It's a fertilizer. A "chemical" is the most generic name you can give any molecule. Water is a chemical. Table salt is a chemical. Sorry for the digression. I just don't like how the word "chemical" seems to get used in a lot of contexts. While what you said is correct...

Here's the percentages of everything needed to recreate a few of their products. There's a lot of decimal places to make sure I I didn't lose any precision on the micro nutrients. Jacks Hydroponic 5-12-26 Magnesium Nitrate: 32.34490% Potassium Sulfate: 22.09204% Magnesium Sulfate...

FYI this has also been posted on my website, which as it turns out, is more like a blog. You will also find a few charts there which are helpful. It's not really practical for me to recreate them in a forum post. Applying fertilizers to irrigation water (fertigation), hydroponic systems, or...

TBH, I'd just use the potassium silicate as a foliar spray. I recommend potassium carbonate or potassium hydroxide as a pH-up reagent.

I recommend you read my thread on Reverse engineering nutrient blends. https://www.rollitup.org/t/reverse-engineering-everyones-nutrients.893906/

You use Dyna-Gro Liquid Pro-tekt? Because it's just potassium silicate in solution. I've already done it. It's at the bottom of the page. http://www.open-salt.com/fertilizer-database/dyna-gro/

I've heard a lot of people do the application this way. And at this point, it makes a lot of sense. Low concentrations in a foliar spray.

Come to think of it, I think you are right that it is not an MKP/ Mg problem. I don't use silica often enough to have encountered something like this before, so I couldn't really be sure that that is the problem. Also, hence why I told him about the Jar Test.

Have a look at their schedule: http://foxfarmfertilizer.com/images/pdf/hydroenglish2015.pdf Divide by 4 during weeks 5ish through 12. Maybe you start it at week 6 or 7.

It's not a bad idea to take precautions in instances like these. I'm am not a fan of inhaling powders of any kind.

Adding new nutrient solution to existing reservoir is not actually the problem you might think it is. The recommendations I make to commercial clients is to seldom change your water. But, we also have the added benefit of water quality analysis to tell me what's in the water and we do that every...

They should be EDTA chelates. Once I get Open-salt fully functional, I'll try to offer pure chelates instead of a micromix like what you linked to. The Smart-Fertilizer software is the one I use, actually. Entry level pricing is definitely out of range for the home user. Plus, hydrobuddy does...

What are you using for your micronutrients? Just EDTA chelates, right? If you are mixing all of your magnesium sulfate and magnesium nitrate with chelated micro nutrients, it's possible those are also contributing. In that case, move to a three part for this. Also, if you're willing to drop...

One thing I do want to mention is that solubility of each blend of fertilizers is often times figured out via trial and error. What's done is called the Jar test. Using about 1L of your source water, you mix everything in the concentrations you plan on using and then look for a precipitate. If a...

Also, in regards to how concentrated your stock solutions are, I want to let you know what many liquid blends are in the 1000 - 4000x concentration. So, your mixes at 200x aren't a problem.

Since you're using Hydrobuddy, what are you target concentrations of each macro/micro nutrient? And what is going into each stock solution? How many grams of each fertilizer?

I have given thought to all of that. Once it becomes something beyond an information source, that is, an online store, I will pay for advertising. I'm working on all of it right now. More blends. Better organized website. Everything.

I never realized how expensive the RAW brand is. That's ridiculous. $22 for 8oz? I can buy 50lbs for that much.

It sounds like you're definitely getting calcium precipitates, but it's not due to flocculation. Ex: Flocculation is what happens when you try to add cocoa powder directly to water, it clumps on top or bottom of the solution. What are the volumes of your stock solutions? 1L? 5L? How accurate...

I usually find it easier to by a 12.5% solution. Mostly because a 12.5% solution is easy as shit to find. And it's pure. And something to remember: 12.5g/112.5g =/= 12.5% If you want to use 12.5g to make a 12.5% by weight solution, you need to add 87.5g of water, 87.5mL. Also, you'll want to...