The Jacks website refers to a different Part A, if your tap water has more than 50 ppm of calcium. They recommend a product with 15-5-20 as Part A, instead of the usual 5-12-26 Part A. Anyone use this product instead or any thoughts? Thanks
I believe @OGIncognito may have info on this one.
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I have pretty high ppms in my tap. Like 300 and my pH is around 7.7. If i mix normal Jacks A&B (5-12-26 & cal nit) my pH hits 6.43 with a ppm of about 950.
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Jacks can be kinda confusing. The 15-5-20 is a one part formula, or it is just used with epson salts according to the Jack’s schedule for it. I think this is what is referred to as Jacks Tap. You can go to their website, and look up the feeding schedules. This cleared up a lot of things for me.
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Jacks Tap has cal and mag. In it. Its for high akli waters, tap, well water.
Since this has 15 vice the 5 for nitrogen the normal has, it is a one part kit. No part b.
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Thanks for all of the information. I have the impression that not many people are using the “tap water” schedule. I am currently using the Fox Farm line but plan to change to Jacks when I run out of FF. I’m torn on which to go with; the regular schedule or the tap water schedule. Our water is high in calcium per the water company.
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Im part a snd b with epsom. 5. 12. 26 pt A. And 15 0 0 try to usr well water all the time.
Im new grower, i want to keep it the same allowing me to learn the plant without me throwing curve ball into the recipie for the year.
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Since my tap water has both chlorine and fluoride in it. I use RO water, and Jacks 321.
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I use the jacks for tap with my well water with success. Pretty simple.
I purchased the city limits kit.
I was warned that the 15-5-20 would turn into mush so I added silica packs. Still turned into mush. So I add to the recommended ppm. Rather than weighing.
I purchased mason jars to store it in when I replace it.
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Have u tried just using part a and part b no epsoms. Seems to work awesome here so far. I run part a at 4g per gallon part b at 2g per gallon. So 5 gallons is a 20g part a and 10g part b any additives u use is still fine but it omits the salt and to me makes a huge difference on the pots and all .no salt buildup or anything here so far and I’m on the second run of using the 42 method and no epsoms. Jacks has everything needed in part a and part b so epsoms is unnecessary unless u run into an issue where u need to add it to fix an issue.
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New to jacks and going crazy . I’m on well water I grow in 5 gallon dwc bubble buckets. I mix part A at 15-12-26 3.8g per gallon then epsom salt at 1.2g per gallon then part B at 2.5g per gallon. My plants just don’t look as good as my previous grows with general hydroponic. Is my mix chart wrong? Do I need to up or lower something? Or cut something out? I’ve heard such awesome things about jacks321 but seem to be struggling
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Did you check ph. I believe the jacks 321 is normally used with RO water or distilled water.
I ph at 5.8
I use silica first in my RO water before mixing in the Jacks.
I will say on the last grow, using AutoPots with coco . A Black Widow started looking hungry during early flowering. I thought there was a problem with the root control disk not letting the nutrients through, or just not wicking up enough. I disconnected this pot from the reservoir, and plugged the line. Then I watered the base by hand, and completely flooded the base daily. Also being unsure, I switched this plant to Mills Nutrients. The plant recovered and greened back up nicely. But it ended up tasting like crap due to over feeding during flowering. The three other plant did great with the Jacks.
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I noticed the same issue with one of my plants. It was just hitting week 5 of flower when all the leaves started yellowing and dieing off. I was using Jacks 321 also. I am starting to think that some plants need to be fed a blossom booster at the onset of flower and towards the 5th week of flower or fed an extra dose of Jacks 321. I use it with my tap water, 180 PPM @7.8 pH and after mixing in Jacks 321 to 1100 ppm the pH resets too 6.4
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Yes, I bought a small bag of MPK (I think that is the right name). Plan to try the 321 schedule with this added at the light flip next grow.
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Here is the 321 + MPK formula for flowering. It appears from flip to week three then back to regular 321. Of course. The measurements are in grams.
Jacks and MPK
From flip to week 3 of flower 2-2-2 Jacks & 1.2 MPK per gallon RO
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MPK, thats just epsom salt. I was using that and the recommended amounts given by Jacks feeding chart. I think my next run i am going to incorporate Jacks Blossom Bloom into a few feedings. Or i could just feed more frequent with the 321 formula. I’ll have a few plants to work with.
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