Rust spots... I need advice.

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Ozzie1961

Member
My first grow. 10 day old Gorilla Glue Autos are showing some rust spots. A couple days ago I found my exhaust fan flex hose fell between the wall and the grow box and was blocked. The rust spots started then and I am just making sure it was a ventilation problem or is it something else. 600 LED light at 18”. I have a circulation fan going. Temps are 75 degrees. Drain water is at 7 ph and 300 ppm. No nutes.

I appreciate any comments you have.
 

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Boatguy

Boatguy

Well-Known Member
Ozzie1961 said:
My first grow. 10 day old Gorilla Glue Autos are showing some rust spots. A couple days ago I found my exhaust fan flex hose fell between the wall and the grow box and was blocked. The rust spots started then and I am just making sure it was a ventilation problem or is it something else. 600 LED light at 18”. I have a circulation fan going. Temps are 75 degrees. Drain water is at 7 ph and 300 ppm. No nutes.

I appreciate any comments you have.
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Guessing it is from whatever you are spraying it with.
Yes... even if its just water
 
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Ozzie1961

Member
Thank you all. I sprayed some fungicide on them today just to calm my nerves. The other 2 plants, 7 days old, are showing no signs.
 
curious2garden

curious2garden

Well-Known Mod
Staff member
Ozzie1961 said:
No, not spraying them anymore. I think it is actually a calcium deficiency. Cal-mag arriving today.
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If they were bigger and you weren't running 300 PPM water I'd say Calcium too but I've never seen it hit a plant that small. I run 250 PPM water and never see a Ca issue until my plants mid veg. Anyway hope Calcium fixes it for you. Let me know please, I'm Curious.
 
Logan Burke

Logan Burke

Well-Known Member
Yeah I definitely wouldn't add any calmag yet...see if symptoms halt or if they progress. Particularly given that your leaves appear to already have adequate N. Soil is generally less prone to a lack of Ca or Mg. I'd actually be quite surprised if there wasn't enough already in your soil and water to sustain such a young seedling. Good luck.
 
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Ozzie1961

Member
I used cal-mag. All of them spunked up and looking better. The most affected one is slowly recovering. I started 1/4 strength nutes also. Will add pics in a few days.
 
Zinger59

Zinger59

Well-Known Member
Ozzie1961 said:
My first grow. 10 day old Gorilla Glue Autos are showing some rust spots. A couple days ago I found my exhaust fan flex hose fell between the wall and the grow box and was blocked. The rust spots started then and I am just making sure it was a ventilation problem or is it something else. 600 LED light at 18”. I have a circulation fan going. Temps are 75 degrees. Drain water is at 7 ph and 300 ppm. No nutes.

I appreciate any comments you have.
Click to expand...
Could be too high temperature. CalMag if reverse osmosis water is used. Never had this problem so young.
 
Logan Burke

Logan Burke

Well-Known Member
Ever since I made the switch to CMH lighting, it seems like I HAVE to run calmag from the jump in DWC or else I get a calmag deficiency as early seedlings...so don't feel bad, plenty of us have this issue. At 75F I wouldn't worry about temps...75F is well within the optimal range of temps.
 
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Ozzie1961

Member
IMG_20200216_171630.jpgIMG_20200216_171559.jpgSo I have great news. My 4 plants have recovered. After troubleshooting, I bought a digital PH meter and found my PH was actually 4.4. I had already started cal-mag + so once I adjusted to 6.0 they started growing and getting rid of the rust. Thank you for your comments. As a new grower I appreciate your expertise. Looking forward to the next 6-8 weeks!
 
cannabineer

cannabineer

Ursus marijanus
Ozzie1961 said:
View attachment 4481144View attachment 4481145So I have great news. My 4 plants have recovered. After troubleshooting, I bought a digital PH meter and found my PH was actually 4.4. I had already started cal-mag + so once I adjusted to 6.0 they started growing and getting rid of the rust. Thank you for your comments. As a new grower I appreciate your expertise. Looking forward to the next 6-8 weeks!
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Nice save
 
Zinger59

Zinger59

Well-Known Member
Ozzie1961 said:
View attachment 4481144View attachment 4481145So I have great news. My 4 plants have recovered. After troubleshooting, I bought a digital PH meter and found my PH was actually 4.4. I had already started cal-mag + so once I adjusted to 6.0 they started growing and getting rid of the rust. Thank you for your comments. As a new grower I appreciate your expertise. Looking forward to the next 6-8 weeks!
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I see your ID tag says GG, I also have 3xGG#4 just starting. Good Luck!
 
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