Dwc grow problems and questions

  • Thread starter seedlover42
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seedlover42

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Okay I'm growing blueberry pancakes from himbolt seeds in a 10 gallon tub. I have it filled with 8 gallons of nutrient water. I'm useing cronk 3 part nutrients and cal/mg. Ph is right around 5.9 ppm is 741. My question is my bottom leaves are starting to yellow and then also have brown patches on them. Wondering that may be the problem. I am useing a water ring also. View attachment 2290880
 
amneziaHaze

amneziaHaze

941
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how is the ppm from days before? maybe they are dropping that would mean you are not feeding enough
 
AZreefer

AZreefer

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AZreefer said:
Hit us with some pics buddy!
Click to expand...
My bad. I dunno how I missed that. In which order do you mix your nutes? The pic looks like a cal mag issue but you are using that. Are you adding it to the solution first?
 
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seedlover42

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I mix according to the charts on the bottle. This is a clone from another plant I harvested already. It seems like the ppm level haven't been changing much but it just started sucking up water and after 2 or 3 weeks I've had to add water the past 3 days to it. Ppm levels have remained around 740 ppm. When mixing nutrients I generally just mix them together in a Mason jar of water and then add to the dwc. And the ph has been between 6.4 and 5.8 the last week but been stable the past couple days at 5.8. Also I'm getting a chiller wensday but the temp of the water this morning was 73. I put ice in it and now it's 68. Light is 18 inches away it's a 150watt vivosun programmable light and i have a fan circulating air above the plant and my tent temp is 72.9 55 humidity and 1.2kph
 
AZreefer

AZreefer

994
143
seedlover42 said:
I mix according to the charts on the bottle. This is a clone from another plant I harvested already. It seems like the ppm level haven't been changing much but it just started sucking up water and after 2 or 3 weeks I've had to add water the past 3 days to it. Ppm levels have remained around 740 ppm. When mixing nutrients I generally just mix them together in a Mason jar of water and then add to the dwc. And the ph has been between 6.4 and 5.8 the last week but been stable the past couple days at 5.8. Also I'm getting a chiller wensday but the temp of the water this morning was 73. I put ice in it and now it's 68. Light is 18 inches away it's a 150watt vivosun programmable light and i have a fan circulating air above the plant and my tent temp is 72.9 55 humidity and 1.2kph
Click to expand...
You have a 2nd 5 gallon bucket? Try switching the plant into a fresh bucket of clean and mixed solution every week for the next 4 weeks before you flip. Mix your nutes one at a time into the new bucket starting with cal mag and silica (if you use it) first. Some of the multi part nutes want to be fully diluted before you combine them. Otherwise they try to mix and become useless or too difficult to dissolve. Especially if you are dumping your calmag in the same small cup as the rest of your nutes. This could be causing coagulation of parts of your solution making them unavailable for the plant to use. Fresh feed solution is your best friend in a DWC. The chiller is a great idea! That will help you avoid growing stuff you don't want in your solution.

Your light might be a tad close also. That can push the plant hard and cause it drink up the mag from your solution rapidly also.

To be safe you should maybe give your plant a fresh mix of solution and double the height of your light.
 
AZreefer

AZreefer

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Let us know what changes they make and how they impact your plant.
 
DrDankHands

DrDankHands

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It could be deficiency of potassium and or calcium but this would mean she's suffering from nutrient Lockout.
 
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seedlover42

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Ok how high should light be? I will raise it up higher. Just got ro water going to change over the water in the morning and mix new nutrient solution. I did add more cal/mg to it for now. But I was thinking cal or silica deficiency. Will update it in a week
 
amneziaHaze

amneziaHaze

941
143
get the ppfd meter app if you have a more expensive phone anything that matches samsung s21 camera stuff or stronger and then aim for max of 80 000 lux for flowering
apps precision depends on phones camera but i bought one of those lux meters and the app lies 5-10 000 lux after the 40 000 mark using my phone...
 
ForestSpirit

ForestSpirit

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seedlover42 said:
Ok how high should light be? I will raise it up higher. Just got ro water going to change over the water in the morning and mix new nutrient solution. I did add more cal/mg to it for now. But I was thinking cal or silica deficiency. Will update it in a week
Click to expand...
So I wouldn't dry the air over the plant.
 
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seedlover42

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Ok so I added a chiller amd emptied out the tub and refilled with a new nutrient mix. Seems like it's getting better starting to get bigger. But the leaves are still about the same. Will they heal or do I clip them off? Ph is 5.97 and ppm is 620. Water temp is 68. I also increased cal/mag.
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ForestSpirit

ForestSpirit

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Brother, we need a balance of elements and then the acidity will be stable, the temperature of the solution and the concentration are really related, but first we need to find a balance of elements so that the acidity indicator says at least something.
 
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ForestSpirit

ForestSpirit

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63
If you want everyone to faint at the sight of your plants, ask the spirit how to do it, and don't torture the plants. I came so that cannabis would never be the same🤣If you are ready, let me know. Are your tables not working?))) give yourself a chance to look at plant nutrition with a sober eye.I'm tired of watching this.😭🤣🤣🤣
 
ForestSpirit

ForestSpirit

417
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The knowledge of great agrochemists is ignored on a global scale. We are all victims, maybe we should stop buying useless tables?
 
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