calcium def in dwc?

  • Thread starter Thread starter Little Brother
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Little Brother

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Problem: spots on fan leaves.

Medium/grow method: dwc

Feed: and supplements used: megacrop and hydroguard

water source: distilled water

Strain/age: dp autoextreme week six or so

light used: 3500k cob. will add a second once flower occurs

Climate: 78°F 65% RH

Additional info: noticed spots start to form a while ago. mixed new batch of water for this week on 9-8. 285ppm megacrop was added to the water for this week as last week was 230ppm with no problems save for the spotting. general hydroponics calmag was added for this week at a value of about 56ppm. the bottle recommends 1tsp per gallon for a light feeding, but since i don't know for sure that cal def. is the problem, i went pretty light.
just wanted a second opinion :toke:
View attachment 1232165View attachment 1232166View attachment 1232167
(i guess i ought to mention that my ppm meter uses the 700 scale)
 
Little Brother said:
Problem: spots on fan leaves.

Medium/grow method: dwc

Feed: and supplements used: megacrop and hydroguard

water source: distilled water

Strain/age: dp autoextreme week six or so

light used: 3500k cob. will add a second once flower occurs

Climate: 78°F 65% RH

Additional info: noticed spots start to form a while ago. mixed new batch of water for this week on 9-8. 285ppm megacrop was added to the water for this week as last week was 230ppm with no problems save for the spotting. general hydroponics calmag was added for this week at a value of about 56ppm. the bottle recommends 1tsp per gallon for a light feeding, but since i don't know for sure that cal def. is the problem, i went pretty light.
just wanted a second opinion :toke:
View attachment 1232165View attachment 1232166View attachment 1232167
(i guess i ought to mention that my ppm meter uses the 700 scale)
Click to expand...
Boycott anything made by general hydroponics and ask your grow shop not to sell it.

It's Monsato/Bayer owned
 
Autofire said:
Boycott anything made by general hydroponics and ask your grow shop not to sell it.

It's Monsato/Bayer owned
Click to expand...

GH is not owned by Monsanto. GH is owned by Scotts. Scotts distributes Roundup to consumers. Scotts is not owned by Monsanto.
 
Little Brother said:
Problem: spots on fan leaves.

Medium/grow method: dwc

Feed: and supplements used: megacrop and hydroguard

water source: distilled water

Strain/age: dp autoextreme week six or so

light used: 3500k cob. will add a second once flower occurs

Climate: 78°F 65% RH

Additional info: noticed spots start to form a while ago. mixed new batch of water for this week on 9-8. 285ppm megacrop was added to the water for this week as last week was 230ppm with no problems save for the spotting. general hydroponics calmag was added for this week at a value of about 56ppm. the bottle recommends 1tsp per gallon for a light feeding, but since i don't know for sure that cal def. is the problem, i went pretty light.
just wanted a second opinion :toke:
View attachment 1232165View attachment 1232166View attachment 1232167
(i guess i ought to mention that my ppm meter uses the 700 scale)
Click to expand...


How's the pH?
 
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