Whoa what is happening!!!

What the heck? Woke up this morning and saw it like this. Only two plants are like this the others look fine. Any thoughts?!

Maby a calcium def!!

Oh no! I fed them yesterday(Megacrop). Should I wait it out and see or should I put some more cal in there? And if so what’s a good cal mag supplement to use? Thanks!

do all your checks first like ph and so on!!

Ppms are super high think that could be why. Fed them yesterday with megacrop little over 1000ppms. Ph is 5.8 water temp 72( don’t have a chiller but running hydroguard just for safety. Clones tbat were put in on the 6th 3x Candyland 3x Peyote Cookies(which are the affected plants) 1x Gg4 and 1 Cookie Glue, rdwc 35 gallon res 8 5 gallon buckets.temp 79f rh 40%

Guy,
You need to do a water evaluation thing. What water and how many minerals. Then determine if more Ca++ is needed. If you're ok on calcium...then Epsom salts are what most guys use.

I'm in an awkward situation where I have to add half Epsom salts and half calmag to get both correct.

You can get brown spots from too much Ca too.
JD

JohnDee said:

Guy,
You need to do a water evaluation thing. What water and how many minerals. Then determine if more Ca++ is needed. If you're ok on calcium...then Epsom salts are what most guys use.

I'm in an awkward situation where I have to add half Epsom salts and half calmag to get both correct.

You can get brown spots from too much Ca too.
JD

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How would I go about doing that is it something I need to buy? And where? Thanks!

From what I've gather and looked around it could be a magnesium def. Any thoughts?

that1guy1388 said:

How would I go about doing that is it something I need to buy? And where? Thanks!

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Guy,
If you have an EC tester...that's a start. That will tell you the total dissolved solids...but not what they are.

And most municipalities will post their water district quality report on their website. When you try to do hydro with sub par water...you get problems just like you did.
JD

whoever you pay your water bill to can provide you with a water report of whats in your tap water

personally i think if you're feeding 1000ppm of megacrop its unlikely you have a deficiency and more likely you have a lockout/pH problem

i would reduce feed by 50%, make sure you're letting pH drift from 5.8-6.2. keeping pH too low can cause cal/mg lockout. as can excess of other nutrients. also make sure your heat/humidity are within range. <80F and >50% RH will help

pulpoinspace said:

whoever you pay your water bill to can provide you with a water report of whats in your tap water

personally i think if you're feeding 1000ppm of megacrop its unlikely you have a deficiency and more likely you have a lockout/pH problem

i would reduce feed by 50%, make sure you're letting pH drift from 5.8-6.2. keeping pH too low can cause cal/mg lockout. as can excess of other nutrients. also make sure your heat/humidity are within range. <80F and >50% RH will help

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Awesome thanks! I currently haven't touched ph and probably a week I was going to let it slide till I need, right now its at 5.8. Is there something I can do/add to help my current situation? Thanks!

JohnDee said:

Guy,
If you have an EC tester...that's a start. That will tell you the total dissolved solids...but not what they are.

And most municipalities will post their water district quality report on their website. When you try to do hydro with sub par water...you get problems just like you did.
JD

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ppms 1061 or ec of 2.1 on the 500 scale bluelab truncheon

that1guy1388 said:

Awesome thanks! I currently haven't touched ph and probably a week I was going to let it slide till I need, right now its at 5.8. Is there something I can do/add to help my current situation? Thanks!

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i would probably do your next feed at 6.2 using pH up. i would reduce fertilizer by 50%. 500ppm should be more than enough for plants that size.

I couldn’t find one from this year or even last year which isn’t good so looks like I’ll have to call them but this is what I found from 2017

pulpoinspace said:

i would probably do your next feed at 6.2 using pH up. i would reduce fertilizer by 50%. 500ppm should be more than enough for plants that size.

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Will it hurt anything if I just let it go till next feed is my concern? Could be a week or so. Looks pretty rough.

that1guy1388 said:

Will it hurt anything if I just let it go till next feed is my concern? Could be a week or so. Looks pretty rough.

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without pH up? its tough to say.

your water report is as expected. mostly calcium carbonate in there. and megacrop has calcium too. so the first thing i would say is pH up.

calcium is actually only absorbed above 6 pH. you can look on a hydro feed chart to see. https://www.growweedeasy.com/ph the blue chart about half way down

there are products you could use in a pinch as pH up, like baking soda. but its not ideal i think cause it has sodium in it. ideally you want to use a pH product from the hydroponics store.

pulpoinspace said:

without pH up? its tough to say.

your water report is as expected. mostly calcium carbonate in there. and megacrop has calcium too. so the first thing i would say is pH up.

calcium is actually only absorbed above 6 pH. you can look on a hydro soil chart to see. https://www.growweedeasy.com/ph the blue chart about half way down

there are products you could use in a pinch as pH up, like baking soda. but its not ideal i think cause it has sodium in it. ideally you want to use a pH product from the hydroponics store.

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I have plenty of pH up and down I just thought I was good being in hydro that 5.8 was a good range to be in? if you are suggesting to up my pH then what should be it to help better the situation I'm in? Sorry about all the questions still kinda new and this threw me off when I saw it it literally happened over night!

that1guy1388 said:

I have plenty of pH up and down I just thought I was good being in hydro that 5.8 was a good range to be in? if you are suggesting to up my pH then what should be it to help better the situation I'm in? Sorry about all the questions still kinda new and this threw me off when I saw it it literally happened over night!

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no problem!

5.8 is a good value but you want to let it drift a little bit. 5.8 is on the lower end. you want to keep it centered around 6 and let it drift between 5.8 and 6.2. this will let it absorb all the nutrients you need.

so maybe next feed at 6.2, then after that 5.8, then 6.2 and so on

"Hydroponics, Soilless or Coco ~ 5.5 – 6.5 pH

For hydroponic growing setups (as well as soilless growing mediums like coco coir) an optimum root zone pH is between 5.5 and 6.5. This is slightly more acidic than the optimal root pH for growing in soil.

It’s a good idea to let the pH cover a range instead of always adjusting to the exact same pH number.

See which nutrients are best absorbed at which pH levels



With hydroponics, it’s especially important to allow the pH to range slightly, as you can see above, some nutrients can only be absorbed at higher or lower pH’s.

In a hydroponic setup, you will almost always be using liquid or powder nutrients, so save yourself a ton of trouble by watching and adjusting the pH as needed! The pH will naturally change over time, and you only need to correct it when it starts going out of the 5.5-6.5 range."

pulpoinspace said:

i would reduce fertilizer by 50%. 500ppm should be more than enough for plants that size.

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this is good advice. i'd give a 12hr flush with pH'd plain water first. after the flush, i'd foliar feed with cal/mg first and then start back on even less than 500ppm (250 to 400) and see how they react.