Hi there, sorry to join a little late, i have been reading about your problems and looking at your leaves, if you live in the city u should get a 30 gallon res or more and fill it up and airate it for about a week before introducing it to the plants this ensures that all chlorine evaporates from the water. If you were using GH products that is what i use the 3 part flora series, and i also use the floralicious bloom along with the flora nector which both have some organic compunds. Switching nutes is not always a good idea. In my experience GH is one of the best. Another thing u need to know that in hydro a little goes along way, in bloom i use 1 tsp per gallon of the micro and 2 tsp of bloom along with 1 tsp of kool bloom starting in week 5. I also add 1 tsp per gallon of the floralicious bloom and flora nector, since the numbers are not high and they manly provide vitamins and minerals the plants love this and respond quite well, this is where u will see the true colors and smells they have to offer. Drain your res every two weeks and replace with fresh water and nutes refilling through the week with a 1/4 strength nute solution. if you are seeing problems with the roots flush the systems with flora clean for 15 minutes or try flora shield. I hope this helps if you have any questions i would be happy to answer them, keep growing !!!