Ayuda Hidroponia

potassium deficiency, i'd guess? 0.8 EC is too low for a mature plant under any decent lighting. I'm not a fan of AN's proportions of nutes.. find someone that doesn't have a burnt, shitty canopy and mimic what they do, assuming they put in accurate info into diary. start paying attention to the concentraion of each nutrient molecule and overall concentration. overal in range of 1.3-1.5EC should be a good starting point.. if any problems arise in that range it is due to balance of nutes that make up that total concentration. manic botanix has an online calculator for this. once you dial it in, it's not something you have to pay attention to much... some plants may need slight adjustment, occasionally. but once you have a familiarity, don't need to calculate things at that point to get it done. high efficacy vs low efficacy lights makes a different in how many watts per sq ft to shoot for. high efficacy can get away with 20-22w/sq ft on an 18/6 cycle. that same light needs to be 30-33w per sq ft for 12/12 light cycle -- it is 1:1 proportional to hours of use, as you can see. Less efficient lights will need more than this to be near max DLI for ambient co2 levels. (Daily Light Integral)