Need help for my babies!

[rcdunn1]

Hi everyone! I need your help with a problem. My Medusa females are starting to look really bad! The leaves are changing colors (getting lighter) and kinda spotty looking ( see my pics). This is my first time with indoor growing. i am using a top fed drip system, I have been watering 3 ties a day, 15 min. each time, and running 700 ppm. I'm using floranova's high 5 starter pack. I have been running Ph of 5.6 and using distilled water. Also using Magical 8ml per gallon. I was wondering if this is enough magiCal, and what other people are doing? My Snow white females are looking good other than a few little burn spots on a few of the leaves. I have also noticed that some of the leaf tips are starting to droop down. Do I need to step up my nutrients? Can anyone give me some advice? I would think 7-800 ppm would be a good number for vegetating growth, and with growing 2 different strains I know the Medusa's can't handle the nutrients that the snow whites can.
I've had alot of problems through this growth. i know that the medusa is a much more bushier plant and know that some of the bottom leaves won't get the light, but they are just starting to look really bad. I did my reservoir change yesterday because my ppm's were starting to drop after 8 days of staying the same. Take a look at my pics and tell me what you think.

[ISO2BWELL]

The top of the plant is looking pretty good, save that one leaf that I would remove before it starts sucking off the plant when it is no longer a benefit.

First thing I might do is to put them in "FLUSH" mode for a couple days to clean out what is ailing them, then start back with about 400 PPM. I use RO water, and use a cal mag+ supplement as well. It almost looks like a mag deficiency on those leaves, but I can't say for sure.

Some folks are different, but I never veg a plant hotter than about 500ppm, and still get good results. That leaf damage on the lower leaves may be nute burn, as since the lower leaves do not get the lumens as the upper leaves do, they can not expel the toxins as fast as the top leaves, hence, they burn rather than vent it out via photosynthesis.

Giving them a good flush is a safe place to start.

ISO