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DWC calcium deficiency
Seeweedstarted grow question 3 days ago
This situation:autoflower,42 days,food 750 ppm(water 60ppm,calmg 140,base bloom 550 ppm)ph 6.0, rusty spots began to appear on the upper fan sheets.Increased calmg to 220 ppm,and added pk 150 ppm,but the spots are progressing.At the same time buds are getting bigger. More calmg?
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Leaves. Color - Mottling
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Hoothootanswered grow question 3 days ago
Autoflowers in DWC. CalMag total range of approximately 150 to 275 ppm is generally advised during their vegetative and flowering stages.
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Scrubbyjimbobanswered grow question 3 days ago
Calmag isn't the type of micronutrient you need in massive quantities and too much is as bad as too little. Are the numbers provided(750ppm, 6pH) taken at the time you mix or a recent tank sample? When dealing with issues in DWC I go straight to the tank. Roots lookin good? When was the last time you did a fresh tank change instead of just topping off? I would consider a fresh tank if it's been awhile. Precipitates/silt can build up at the bottom of your rez over time. Sometimes something gets mixed wrong, I've gotten distracted while mixing nutes and screwed up on more than one occasion lol.
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