Exactly what I just started with some autos I have finishing up and also some longer flowers I started just knowing that they are going to want a little less N. Would have done this sooner but I was unaware until @The_Lazy_Hippie dropped the news hot off the presses about the new offering. And yes that shipping was insane. 
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i want to get some but not paying that shipping lol. i will look around and see if someone has like 2lbs to sell me
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So these are two pictures of fertilizer packs.
The first line about 5% nitrogen is probably a typo.
Further values of micro elements do not match because it is relative percentages or they have reduced the amount of micro elements because they present this formula as a last week mix?
UPDATED just got the answer directly from jacks the micros are the same between the two.
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Im very sorry but hydrobuddy does not work on my macbook
Can I ask you to make similar calculations but for
Jacks 3g/G (part A 0-12-26) + 2.5g/G (part B) + 1g/G (Epsom)
I am still afraid of such high calcium values since I use tap water
Also I think that nitrogen around 100-110 will be great for flowering
Thank you!
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@serx Here is the actual label directly off the bag I purchased.
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Here you go!
|N (NO3-)|99.065|
|N (NH4+)|0|
|P|41.502|
|K|171.046|
|Mg|73.598|
|Ca|118.877|
|S|137.396|
|Fe|2.378|
|Mn|0.396|
|Zn|0.119|
|B|0.396|
|Cu|0.119|
|Si|0|
|Mo|0.071|
|Na|0|
|Cl|0|
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Thank you!
Great, they raised the sulfur from 8.5% on my old bag to 13% on yours.
Perhaps without the nitrate nitrogen and with the increased sulfur I will get a slightly lower ph solution since I use tap water around 6.5-7.
In theory, it’s a win-win.
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Guys, can I get a rough idea of how much calcium my tap water contains?
The only measurement I have is its EC, from 02 to 03Ec.
How much does this raise the overall calcium level in the solution?
Still trying to figure out what my limit is for part B with new 0-12-26
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How available is the calcium in your tap water to plants?
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Less than .3ec… I mean you need a water test to confirm anything, unless someone lives right next door to you. All municipalities and pipe runs will have different amounts of everything.
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One forum post suggests that a typical 0.4 EC supply gives about 60-80 ppm of available calcium.
Also following the logic from the table from scienceinhydroponics I can estimate that available calcium contains about 1/3 of the total ppm of water on average.
That’s all I’ve been able to find so far. I estimate my water at 0.2ec will have about 35ppm of available calcium in it.
It remains to understand up to what values in the solution I can not be afraid of blocking other elements.
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It’s going to matter what you’re using for PHing, nitric acid or phosphoric, one will make calcium more available and one will precipitate it out. I don’t PH my tap for this reason also I use big soil and it doesn’t seem to care:
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@serx testing your water as others have said is really the only way, what comes out of your tap will be similar to someone in the same water system but not the same as when it left the water plant. If you can find a water test from the municipality for your neighborhood that’s better, but using a simple and cheap reagent test kit at home is best, you can probably find these in your country but this company in Virginia makes a dazzling array of test kits for everything:
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This discussion brings up a good point about adjusting PH and its effect on nutrient makeup in solution.
I use RO water and my ph after I add my Jacks is about 4.8 so I have to add a pretty significant amount of General Hydroponics PH up solution which is potassium hydroxide and potassium carbonate to get me to 6. I bought some Calcium Sulfate, Calcium Carbonate and Calcium Phosphate from Slownickel to boost my calcium levels up. Will any of those bring the ph up as a better solution then using the GH stuff?
There might be something here that can help you, and if not, just ask in the comments below the article.
This site is updated quite a bit, and what’s cool contains a lot of information beyond the hydrobuddy
I’m actually impressed with how active this person is in helping in the comments under his articles.
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and also is it a bad idea to mix RO water with tap in some proportions, say 3/1, which will bring up the ph and at the same time add some calcium in the solution?
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lots of ppl i used to talk to did that. usually 50/50 re using dehumidified water also.
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Unlikely to happen. Did you find it?
Last I checked it worked on my 2012 mbp… It’s not fun to use though.
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no i have not
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Masterblend released an update to their 0-12-26. I made a post about it in @lefthandseeds synthetics thread. Changed it to 0-20-42 or something like that. More details there, or on CHN website.
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