Your plants look pretty good, with some early lockout symptoms, and the scorchy nasty low leaves are showing what looks to me like a problem stemming from your 'drinking water' whcih likely has sodium in it. BAD for plants! Locks out other nutes. But the plants look good. The few small tan/rust patches I see look like potassium lockout. That can be caused by the sodium too. Teh pale stripes on some leaves look like a Mg def/lockout.
You got a bottle of GH micro? Spray n Grow? Algoflash? Put a teaspoon in a quart of water in a spray bottle and use that, lightly, a couple times and the problems will go away. I don't know what your foliar spray is- never heard of a waterfarm nute- but you need a good Micro foliar.
What's wrong with your tap water? Jsut curious.
I'd flower them out asap because that system looks like it was designed for flowering clones and your plants are still going to get much bigger!