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This is not for weed but it's weed fertilizers so hopefully someone can help. I started an NFT system and ran it without plants to check for leaks. 2 days later this is what I saw... It was MasterBlend at the time so I switched for General Hydroponic Flora I had left and same thing happened...

Knowing that P is about 43.6% pure and K is about 83% pure. If I take Potassium Phosphate for example, which is approx P-52 and K-34. Do I measure using 52-34 or do I measure using the actual 43.6 and 83% of 52-34 ?

Hey ! I use GH flora series and Cal/Mag. Milwaukee MW802 (700ppm) I want 500ppm for veg but when I use 1/2tsp of Micro, 1/2tsp Gro and 1/4 of Gro I get 480ppm including the 70ppm from the filtered water. Which is where I want it for veg stage. But, adding the Cal/Mag gets it to 930ppm. (Yes, I...

Hey guys, Been outdoor growing for many years and decided to try DWC. I ordered one Alfred bucket kit to get used to it. Been reading all kinds of info but I have a few questions that have conflicting or no answers. -How high should the water be at seedling stage ? -How high should it be...