Magnesium Defeciency???? Need Help

So this problem has started at the bottom, one side of the plant. Then moved all around and is now working it's way up. The plant is in a Waterfarm. PH stays at 6.0. I use Pureblend Pro, LK, Calmag, hydroplex. I was using tap water, but I have very hard water. White calcium deposits gets caked on my waterfarm ring. Now i use store bought water and I still use cal mag, but the problem isn't getting any better. I thought maybe the calcium was locking out the magnesium, which I still think was happening. I even tried epsom foliar sprays once a day. I thought using different water would help, but I don't think it is helping. Air Temps stay around 68 night and day, revervoir temp the same. Is it possible that I wasn't using enough calmag cause I have a Very Mag. hungry plant?(5ml per gallon) Last res change I did 15ML calmag for 2gallons. Overall the plant is healthy and lush. Any advice would be greatly appreciated.

when this started did the color of the leaves the whitish on the edges was they different colors and then changed to this color or was they always the color thy are now on the edges?

also what lighting are you using
and what ppm's and ph and water temps are your system at?

how many plants and what strain and how many affected if more than one

but i will say this, that is not a magnseium deficiency nor calcium

looks to me like unstable ph or overfertting a bit i´m growing only soil so i dont see such things often
Fj

MynameStitch said:

when this started did the color of the leaves the whitish on the edges was they different colors and then changed to this color or was they always the color thy are now on the edges?

also what lighting are you using
and what ppm's and ph and water temps are your system at?

how many plants and what strain and how many affected if more than one

but i will say this, that is not a magnseium deficiency nor calcium

Click to expand...

I have 2 plants, this one w/ problems is a White Rhino 5 weeks into flower. The other is a Mindboggle X NYCD. The diesel is looking fine, nothing like the Rhino. I"m using a 400watt HPS on the rhino and a 400Watt Agrobulb on the diesel. My ppms i'm not sure about. I use 20ML of PBP bloom, 10ML of Liquid K, 5ML Hydroplex, 5ml CALmag pergallon. Water temps at 67, 68 F. I have an AC window unit blowing cold air into my closet to keeps the temps cool. I'm pretty sure it's not over fert cause it started with the lower side of the plant and progressed( I should have asked for help earlier but i thought changing to RO water WOuld help). The upper half is lush beautiful buds. As for the PH I keep it at 6.0 and check it every other day. I don;t have a digital PH meter, I use the little vial and liquid indicator PH control Kit by General Hydroponics and I make sure the indicator liquid is Yellow which is 6.0. The leaves seem like they just get crispy and and die. They don't really turn yellow first and then start dieing. Patches of the leaf just stay kinda greenish but get crunchy and flakes off. Heres a few pics of the healthy top of the plant.

Here is a Pic of my PH control Kit. The vial is dark yellow which should be 6.0. Is this not a viable PH testing method? Is it possible that my PH is still too basic? PLease I need help because the problem is getting worse.

Looks kinda like K def to me. What's your humidty like?

well I borrowed a PPM meter today and tested my reservoir, it was at 1875. Way too concentrated. So i think this is a toxicity problem. The plant is too big for a water farm so it's drinking all the water and leaving a lot of the nutes. So i'm gonna back off on the nutes to maybe half strength or a little less untill they recuperate. Thanks for the input. if it doesn't get better I'll be back.

TokenRings lol u have already identified the problem before I could post that that is what it looks like.
Definetely not a magnesium or calcium deficiency

Very nice looking plants though.

thanks

Yep you figured it out.

Check the PPM of your water or tap water. I had a similar problem when I first started. Thought it was nute deficient. Turned out it was nute lockup because my PPM was damn near 2000. Was using tap water that had a starting ppm of almost 500. Switched to RO water bought at a store and cleared right up. (Also fixed my PH flux as well which also cause lockup)

try to get a digital ph meter. they work lots better because the color of your nutes cant affect the test. it saved me much time and trouble when i got mine.