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Epson salts or magnesium sulphate ARE salts. ALL nutrients are salts . SODIUM CHLORIDE is referred to as table salt but is just a layman use term of mineral salts. nitrogen salts , potassium salts .ALL FERTILIZER INGREDIENTS are SALTS. it's just a chemistry term . magnesium sulphate...

your runoff should be about 1350.ppm .2500 is way to high .

not a great kit. hard to read . maybe that is kn the 6's?

that is a immobile mineral issue and salt burn. probably iron but hard to say . what do you feed ? I did not read all the replies .sorry..

it's a good idea to have a pen . even a cheap one . if not a flush WITH NUTRIENT will at least solve any issues. whether its high ec , missing minerals or whatever a good flush with a complete nutrient solution will solve most issues . push out old unbalanced solution and replace it with...

what is your EC runoff ? that looks like lockup from high ec if it start at top its immobile mineral bottom its mobile mineral

thst looks like iron deficiency

well that is a immobile mineral issue . whether is a actual deficiency or a pseudo deficiency caused by mineral lockup is hard to say. what is your runoff EC?. I believe it's only boron and calcium that causes main tip die off.

can you account for all 12 basic minerals needed ( not including Chlorine) ? the top of the plant indicates IMMOBILE mineral issues if its minerals ( SO NOT N P K Mg ) what are your trace content feed like ?

I do not run nor like DWC but it would fall under water culture for feed strength so should be 1700 Us( microsemeins ) or 1.7 EC

well the last 4 weeks of bloom should have a slightly different k:n ratio. I run veg for 1st 2 weeks of flower then i switch to a 50/50 blm/veg formula for the next 2 weeks then full bloom for the last 4 weeks bloom

what is the runoff EC?

pics please

are the cuttings dying? if they are look up pythium. if they are not I would guess iron F3 . ferric iron .

Am in Ontario. you can get a lb from 100 to 1000 if you are connected. street maybe up to 2000? my buddy picked up 1000 p at 100 each of triple A from the LP as there is a massive glut here. everyone and there dog grows. I give it away free now. gave the bell repair guy a couple oz as a tip. lol

0.76" drip line from CHAPIN WATERMATIC now called JAIN I think ? is cheap and works excellent. it is self sealing .all you do is cut 2 or 3' length and it runs at 160 ml per minute each line. I use 1 line oer 1 gallon of pot size so 4 dripper in a 4 gallon container. 2500 ' line is 100$ ...

that is most likely salt buildup in media causing lockup . tip burning is a sure sign. what is your runoff EC?

yes 100% agree . its actually the higher light levels the lower feed EC. 600 ppm is perfect feed for most carbon based media with up to 50% higher for runoff. they look excellent!

all fertilize comes from the exact same 20 or less compounds. 75% of all fertilizer comes from about 7 basic compounds. they are essentially all the same. I have always made my own fertilizer solution they are very inexpensive. it cost about 1$ a liter or less to make 100:1 concentrate