ILGM Bruce Banner - Indoor DWC LED

Week 2: -No nutrients added. -Reduced pH from 6.4 to 5.7. Will let it naturally rise to 6.4 before reducing again. This will cover the entire recommended spectrum and allow nutrient uptake at various pH between 5.5-6.5. 0.4 ml/gal of 'pH Down' reduced from 6.4-5.7 (10 ml total for 25 gal). -Significant growth during week 2. Second set of leaves is in and 3rd are emerging. Roots looking healthy and well submerged within nutrient solution. Much faster in hydro than my first 2 soil grows. -Slight twisting of leaves and showing signs of oxygen deprivation (similar to being over-watered, leaves look heavy and plump). This could be a result of temps too high in nutrient solution (75 degree nutrient solution observed. Optimal is mid-60s. Dissolved oxygen decreases as temperature increases, resulting in less oxygen in the root zone which manifests similarly to over-watered/drowning plants in a soil grow.) I will lower the light closer to the plants and reduce intensity, which should reduce temperatures. Another option to reduce temps is to move the light ballast outside of the grow cabinet. Last resort will be to buy an expensive water chiller (will try to avoid during this first hydro grow). -PPM continues to rise by about 10 per day (currently at 627). Maximum recommended PPM during seedling stage is 600ppm, but most recommend starting at 300ppm and only adding more if deficiencies are observed. I'll keep an eye on it, but may need to remove some of the nutrient solution and replace with pH'd water to reduce PPM. -Leggy observations during week 1 were resolved by increasing light intensity. Stems are much more firm and not blowing back and forth anymore. -Planning on growing 5 nodes before topping to the 3rd node and mainlining.