RQS C My first grow

If your pH is really 14 then yes you have a really bad pH problem. Is that for real? What about EC/PPM of your feeding?

First, are you sure you are giving the equivalent of 1 liter of water per 24 hours? If that's true, I think for starters you are giving them too much water. I think that for a 7.5 litter pot 1.2 to 1.5 liters of water should soak the media pretty good and it should last you 5 to 7 days, before needing another watering. Second, in soil I don't recommend that you go over 1.4 EC and that's on the peak of flowering and you are at 1.6 EC. It is better to err on the side of caution and feed too little, rather than too much; a little deficiency won't impede flowering, but overdose can be disastrous. Third, with the first two points in mind, you appear to be feeding too much, too often and most probably a combination of both. Not only you should feed less regarding nutrient strength, also you should feed less often, like once every 7 to 10 days. On last grow, I watered and fed once every week (after 8 weeks of no feeding) and had some (benign) bugs due moist soil conditions. This time I'll extend the time between watering to 10 days. The pictures you posted show really dark green leaves with rust spots and yellowing veins. Looks like nitrogen toxicity with potassium overdose that's in turn locking out other secondary nutrients. I would flush the soil and no nutrients for a week before starting them again with a 1 EC strength solution.