First Ag Grow - Nutrient/Ph Issues?

Hi - I'll start by letting you know the setup details - nothing fancy. Using an AG Extra with 2 airstones (the 4-5" bar style) and GH Flora Series nutes. Germed from bagseed. The AG pump is off at this point and only running the airstones. PH has been fluctuating quite a bit and tends to gravitate to the high side around 6.8-7.1 so I know I need to bring that down a bit.
As you can see from the pics the leaves are not as green as they should be and theres some curling down going on. The plant is obviously young but I'd like to get whatever isssue i'm having corrected while I can.

Using equal parts of the Micro/Grow/Bloom right now at 2.5ml/gallon.

Thoughts?!
Thanks!!

How long into the grow are you? Did you use nutrients right from the start?

Don't be afraid to feed them heavy. It takes a few days for the leaves to turn dark green so you have time to dilute if you need to. What does the label say you should be dosing?

Dude man I would turn on the water within the aerogarden and cut back on the nutes put a teaspoon per gallon and fill tha tank with that and let them for a while it should pick back uP the reason o tell you to turn back on the water so it's constantly moving and not just sitting still that can cause algea or mold.

@Gary - I am at 3 and a half weeks into it from seed. I added nutrients at week 2.
@Muffy - Thing is they started out darker than they are now - they have been getting lighter. Label says 1tsp/gl in early stages but my research wih GH Flora from other posts around here is that it should be used at half strength and worked up or the plants will burn.
@Ickey - I do have the two airstones running 24/7 which churns the water up quite well. The sponges also stay moist up to the top.

I did change the water earlier today - ph'd it to 6.0, and added 2.5ml (1/2tsp) of Micro and Grow - left out the bloom for now. From pics I've seen of others it does appear that I've burned the leaves most likely from starting nutes too early. Will give it a day or two and post an update.
Thanks for the input!

Jadigy: are you following the recommended dosages of the nutrients manufacturer? G/H has a good reputation but it sounds like you have a nutrient problem. Miracle grow isn't a hydroponic nutrient if we're talking about the same thing I use on dirt for my lawn and outside flowers. I'm not saying you're doing anything wrong just very different and if it doesn't work well then you will have a problem. You definitely need air stones but they don't replace the pump. The pump, through drop irrigation, feeds the upper section of your roots and the reservoir takes care of the ones that reach the nutrient level in the reservoir. Thanks to the pump the Aerogarden is an active hydroponics system. You've got some varaibles going on here that you might want to isolate. Use you nutes only as directed, re-engage the pump, check for the recommended light schedule that G/H wants you to use with their products and you may well find the cause of your problem.