Stonerdanswered grow question 4 years ago From the looks of it seems like your plant is having some Phosphorous (P) toxicity! - Lower leaves droop and start to develop tip and margin chlorosis and brown spots while foliage has dark green coloration.
Try lowering the "Medusa's Magic" to about 0.5ml/l, and the "Herculean Harvest" to about 0-0.2ml/l. Check the plants daily for any improvement, if the problem persists then check pH to make sure it is in the right range (5.5-6.5) and lower the dosage by another 0.1-0.2ml/l, if the plants get better then just slowly increase the fertilizer back up as the plant matures.
Other plants look great but may suffer the same problems if not treated.
Hope this helps! Good luck and happy growing :)