Plants Turning Bright Green?

These plants were doing great until a few days ago when they started to turn bright green.
Strain-Grandaddy purp/clones,been in soil for 2.5 weeks now.
Soil-30% sandy loam topsoil
30% forest humas
40% perlight
PH-7.0-7.2 and holding (cant seem to lower)
Light-400w MH
temp range - 72*- 82* Degrees
RH- 40-60

Ok! In the last 2 weeks I have fed them as follows=1st feeding with ff grow big at 1/4 strenght.(1/4 tsp per gal)(PH 6.5).3 days later fed with grow big at 1/2 strenght.(1/2 tsp per gal)(PH 6.5).4days later fed with grow big at full strenghth.(1 tsp per gal)(PH 6.0).2days later I still noticed the stems on the leaves were purple and older leaves were starting to yellow in spots and sag.I leaf sprayed with Epsom salts at !/4 tsp per gal(PH 6.0). and poured the rest of the solution around the base of the plants,about a cup each.This seemed to perk up the sagging leaves,but coler still continued to fade.The next day I leaf sprayed with grow big at 1/2 tsp per gal(PH 6.0).The color still faded till the whole plants are a bright green.Im waiting for the soil to dry out again to feed at full strengh but may not feed again till I figure out whats wrong.Im adding peatmoss to the top 3 inchs in hopes to bring down the PH level wich stays at 7.0-7.2. Any comments or suggestions are more than welcome on what I should be doing next. Thanks

looks like they want some nitrogen.

fdd2blk said:

looks like they want some nitrogen.

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When I leaf fed yesterday it seemed to speed the prosess up, they got lighter green. and today no change.I also forgot to mention that in the last water/feeding I added Liquid seaweed at 1 cap per gal

Well,I leaf fed 2 days in a row at 50% strength (ff grow big) and today just sprayed the leaves with PHed water.I also topdressed buckets with peatmoss and 2 tsp of bloodmeal per 5g bucket for a nitrogen boost.I see some green on the tips of leaves trying to get darker.Hopefully this is a good sign.

After thinking about it,I planted the clones straight from a cup to a 5g bucket.Im thinking that since I pretty much mixed a soiless mixture,the buckets take so long to dry out ,that the plants are not getting fed as often as they needed.I should have planted them in 1g containers instead,they would have gotten fed every other day instead of every 4 to 5 days and I could have see this problem and conditioned the soil in the buckets before planting in them.Hard to flush 10+ 5g buckets. Oh well lesson learned,Luckly I dont need to flush.
If I keep having problems Ill post it,and if they start doing good Ill post the pics.They were really coming along for only being 2 weeks out of the cup with only 2 leaves. anyways all.

maybe just leave them alone for a few days.

Gardenlime:http://www.google.com/products?hl=en&rls=com.microsoft:*&ei=m9ccSru5GaeMtgOWprWLCg&resnum=1&q=espoma+garden+lime&um=1&ie=UTF-8&ei=nNccSs7FMKbyswPTzKCLCg&sa=X&oi=product_result_group&resnum=1&ct=title

yeah,nothing else to do but water in a day or 2.Ill probly feed at 50% strength ,if that, because of the bloodmeal.Dont want them to get too much nitrogen at once.2 of them seem to be darkening up so im sure they'll be fine. Thanks for your comments, always welcome.

Ph is fine. Nitrogen or phosphorus are both suspects. If it's phosphorus then it's very minor. They really look fairly healthy to me, adding N is probably your best bet. Be careful not to over nute though, that can be more dangerous than a deficiency.

Watch the water temp as well.

Thanks for the advice guys,Im going to be carefull since I added the bloodmeal, Ive never done that before, but I tested it out on 2 buckets earlier and they didnt have any problems,yet.Ill water with 1/4 nuets next to be safe,I can always spray um later.And you know! Every time I go to water I think to myself, wow, this water seems kinda cold for being room temp.I let it sit out for a day but the A/C must be doing its job.My garage stays warmer, Ill try leaving it out there.
Thanks again

Well, I got controll of um, Since my last post Ive only leaf fed 1 time at 50% strength.Also, To my watering mix , I added 1/4 teaspoon per gal. of Epsom salts,Superthrive at 5 drops per gal.(not sure if that did anything or not),I cut back to 50% strength on the liquid sea weed (every other watering),And I used 10 drops per gal. of hydrogen peroxide for extra oxygen.I also have sprayed them once a week with a dish soap solution,I found a spidermite on a sprout so started the weekly spraying, OY, the plants are taking it well, no problems at all with that.Over all I lost about 2 weeks of growth,not sure what the problem was for sure but the plants that I planted in 1 gal. pots before going into the 5 gal. buckets, all did very well, and tripled the growth of the GDP's, all in the same soil.Anyways, heres what they look like now.The Plants in the back are the size the rest should be lol.Later all "Happy Growings"

my small seedlings were looking bad so i flushed them and they started getting bright green spots the next day. do you think it flushed everything away and i should fertilize already?

they look sound very very healthy nice grow