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Yup awesome thread, helped me a lot because all the initial info I read on this was just use the 2 parts and you're good to go, but now I see a lot (if not most) add epsom salt to the mix and that would be why my plants (especially one of the strains) are showing MG deficiency. I'm also glad I read this because I finally decided to switch to EC mode on my Blue Labs meter and realized why my plants were burning a bit at 600ppm (was using .5 EC conversion). I'm at 1.1 EC now, plants are getting big and I'm about to change to 12/12.
I ratio I was using used a little more of the cal-nit than mentioned here, so I bumped up the base stuff when I topped off this time. Also added half a gram (per gallon per my concentrated dosing) of epsom salts and I'll add more afterwards if needed, gave them a nice foliar spray couple days ago and they are turning around.
So the general consensus seems to be to basically use the same formula through flower? For anybody here who dials back on the cal-nit, do you find you need to supplement additional calcium?
Also, didn't see much info regarding PH, JRPeters claims this line of nutes is good to go at up to 8PH I believe. My water is 80ppm (well water) and have had it tested by jrpeters and it's very clean, but it is 7.8 PH. I just started using modest amounts of PH Down (half nitrate form, half potassium) to at least get it down to 6.6. Should I trust it without PH Down or do you guys feel I'm doing the right thing, or should go even further and get it down to 6.3 or so?
I have been sourcing my inorganic salts from a large multi-national supplier. Their representatives sell three grades of chemicals: reagent, greenhouse, and agricultural. Reagent is orders of magnitude greater in price than greenhouse which is multiple times in price of agricultural. The other difference is the levels of purity. Reagent grade is for laboratory use. Greenhouse grade is what some claim to be "food" grade. One time, I was picking up some supplies and the secretary asked me if I was using some of the chems for processing food. I asked her why and she told me that I would have to be taxed differently. Nothing was said about the difference in quality. Another time I needed another bag of magnesium sulphate. When I came in for my phone in order, I noticed that the label was different from the other times I bought some. It said "magnesium sulphate" in big letters so I thought nothing of it. At home, upon closer inspection, I noticed the mono/hepta difference when comparing the old bag with the new bag. The new bag also had the word "agricultural grade" on it. I always opt for the best purity I can afford within reason.
So how many grams of epsom would I need in a Gallon stock solution, If I wanted it at the 1 Gram per gallon when I was weighing it out ?
Have you tried mixing the Jacks in a bucket with a circulating pump then pouring it into your container for storage? When I mix me res' I always use a 550GPH or greater pump to keep things moving, takes 2-3 minutes to dissolve.I don't mix them together...I'm referring to mixing up a solution of the 5-12-26 for later application. I have 0 issues dissolving the cal-nit, only the 5-12-26
I brought this up on another forum and nobody seemed to have the issue so I'll ask here.
I have issues getting the 5-12-26 to dissolve fully. I'm always left with a pile of stuff on the bottom. I contacted JRPeters and they even sent me a new container of it and while this dissolves better, I'm still left with a pile of stuff on the bottom (smaller granules than before on the new batch).
I'm using all distilled water, heating it up beforehand, I've even tried near boiling temperatures and I have blisters on my hands from shaking the jug so much. It's a thin layer that basically covers the whole bottom of this gallon of distilled. Others said it was probably the calcium in my tap water causing stuff to drop out, but I'm using all distilled now and still have the issue.
Do you guys just pour the stuff in a jug and shake it for a while? Should I be using a damn blender or something?
From what I've seen, the added magnesium is mandatory in pure coco. With intense lighting I was running into mg issues. With my nutes running at 750 ppm (without mg) I add 1 gram per gallon and it raises my ppm by about 80. Total ppm of solution after mg added is around 830-840. I have some bud setting going on right now that I'll try to post later.Are you accounting for the magnesium that's already in the hydroponic nutrients? That seems like a lot of mg but I'd like to hear how long that's been working for you. I assumed it came with plenty of everything and I wouldn't have to bother with that, but I ran into some pretty bag mg deficiency and have been googling a lot to find out how much to add. I've been told to add as little a .25 grams per gallon and as much as 1 gram (which is about 26ppm of additional mg plus around 34ppm sulfur). Per your math I'd be using over 10x that amount.
Am I accounting for it or is JR peters accounting for it? After all, its their recipe. Magnesium levels are flexible depending on application- which like you said range from 0- 1 gram per gallon. Since I dilute my solution depending on the stages of my plants I also needed to dilute the addition of magnesium while keeping the upper limit of it in solution, Ya dig? Hence the math up there. As for how its working out so far I'd say pretty good.Are you accounting for the magnesium that's already in the hydroponic nutrients? That seems like a lot of mg but I'd like to hear how long that's been working for you.
I assumed it came with plenty of everything and I wouldn't have to bother with that, but I ran into some pretty bag mg deficiency and have been googling a lot to find out how much to add. I've been told to add as little a .25 grams per gallon and as much as 1 gram (which is about 26ppm of additional mg plus around 34ppm sulfur). Per your math I'd be using over 10x that amount.
Your best option is to not mix an intermediary 'jug' concentrate. Nutrient precipitation/dissolve rate occurs in accordance with concentration, so mixing a higher concentrate formula will more likely have issues with this. If my understanding of your situation is correct, the best advice would be to simply calculate how much powder you need for your final reservoir, and add in powder directly there to the final reservoir (for example 100 gallons or whatever). Add the powder in slowly and stir it in as it goes. Its fairly simple math to calculate this out exactly how much you will need, and should have nearly 100% dissolve rate.I brought this up on another forum and nobody seemed to have the issue so I'll ask here.
I have issues getting the 5-12-26 to dissolve fully. I'm always left with a pile of stuff on the bottom. I contacted JRPeters and they even sent me a new container of it and while this dissolves better, I'm still left with a pile of stuff on the bottom (smaller granules than before on the new batch).
I'm using all distilled water, heating it up beforehand, I've even tried near boiling temperatures and I have blisters on my hands from shaking the jug so much. It's a thin layer that basically covers the whole bottom of this gallon of distilled. Others said it was probably the calcium in my tap water causing stuff to drop out, but I'm using all distilled now and still have the issue.
Do you guys just pour the stuff in a jug and shake it for a while? Should I be using a damn blender or something?
The ladies are performing quite nicely. I'm thoroughly converted and I will never buy into bottled nutrient regimens ever again. Thanks for askingHow are your ladies looking? Are your ratios working out?
Are you adding Silica to the Jacks mix? What kind/brand? How much? Gram/ml per gallon?
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