Thanks everyone really appreciate the help! DAMN!!!!
From looking at a thousand pictures of various disorders I feel most like this is magnesium. I am running a drip system in rockwoool. Temps are always in the upper 70's. I am in a 24 hr. on. 400w MH. Just running straight water with fluctuating ph of 5.5 to 6.5. When it gets to 6.5 I use GH PH down and try to keep it around 5.5. I feed the girls 1/2 hour every 8 hours. My drip is more of a steady stream so I have moved feeding a little further apart. They are almost 2 weeks old. I noticed the yellow and brown in the biggest plant but see it starting in some others. There is also a little curling up of the leaves. These are WW. Should I use Epsom salt and how much for a 5 gallon res. I hope someone can help. I have to apologize I had to put the pics in my gallery. Hit the gallery pic and see if you can identify. Thanks
Tough to tell from those pics. If you have a magnifying glass take a picture through that - the camera can focus that way.
As I stated in the original post I have gone through all the pictures and decided the problem is Mag Def. I was just hoping for a confirmation. Was also hoping someone with experience dealing with this, to tell me if it is right to give epson salts and exactly how much to a 5 gallon hydro res.. Thanks for replying not many have.
Magnesium (Mg) - Micronutrient and Mobile Element
Magnesium helps supports healthy veins while keeping a healthy leaf production and its structure. Magnesium is significant for chlorophyll-production and enzyme break downs. Magnesium which must be present in relatively large quantities for the plant to survive, but yet not to much to where it will cause the plant to show a toxicity.
Magnesium is one of the easiest deficiencies to tell… the green veins along with the yellowness of the entire surrounding leave is a dead giveaway, but sometimes that’s not always the case here. In case you have one of those where it doesn’t show the green veins, sometimes leaf tips and edges may discolor and curl upward. The growing tips can turn lime green when the deficiency progresses to the top of the plant. The edges will feel like dry and crispy and usually affects the lower leaves in younger plants, then will affect the middle to upper half when it gets older, but It can also happen on older leaves as well. The deficiency will start at the tip then will take over the entire outer left and right sides of the leaves. The inner part will be yellow and or brownish in color, followed by leaves falling without withering. The tips can also twist and turn as well as curving upwards as if you curl your tongues.
Excessive levels of magnesium in your plants will exhibit a buildup of toxic salts that will kill the leaves and lock out other nutrients like Calcium (Ca). Mg can get locked out by having too much Calcium, Chlorine or ammonium in your soil/water.
One of the worst problems a person can have is a magnesium def caused by a ph lockout. By giving it more magnesium to cure the problem when you are thinking you are doing good, but actually you are doing more harm then good. When the plants can’t take in a nutrient because of the ph being off for that element, the plant will not absorb it but it will be in the soil… therefore causing a buildup. A buildup will be noticed by the outer parts of the plant becoming whitish and or a yellowish color. The tips and part way in on the inner leaves will die and feel like glass. Parts affected by Magnesium deficiency are: space between the veins (Interveinal) of older leaves; may begin around interior perimeter of leaf.
Watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients