Various Problems (6 or so w/pics) need diagnostician

Multiple issues on a few clones/seedlings many pics to show the problems - since there is a 5 pic max i'll spread it out over 3 posts

pro mix ultimate organic soil
4-inch pots - moms are in bigger ones nothing is root bound we cheked
1-3 weeks veg after clones have fully rooted
water 1-2 times daily depending on heat
flowering chamber is a converted chest freezer lined in mylar 12 CFL's and 1 LED with extra red for late flower approx 350 watts total
humidity is ~60-80% during the light cycle depending on heat

temps have been a problem in the flowering chamber - start of light cycle generally cool can be as low as 45 but as the light cylce progresses and the lights heat up slowly the temps have reached as high as 87 on bad days, but generallly keep between 75-80 (although extra ventilation has been added tonight, yet to see if that has made a temp decrease)
temps in veg. chamber are anywhere from 55-72 but don't fluctuate rapidly

nutes used for veg are all purpose chem ferts 20 20 20 0.1% iron, 0.05% Manganese Zinc Copper, 0.02% Boron and 0.0005% molybdennum

in flower Gaia Green high-phos. bat guano 0 - 15 - 1 : 0.32% Nitrogen - 15% available phosphoric acid/37.8% total phosphoric acid - 1.19% soluble potash

first set of 5 pics are from 2 seedlings about 6 weeks old - some of the leaves are dry, and look damaged and mis formed. Other leaves have curled at the ends, some just curl and others have a brown almost burnt looking tip. Many of the lower leaves look like they have light yellow spots and seem a bit too dry. Many of the leaves are experiencing the dead curled tips.

these pics are the little budsicle clones. they have strange problems imo a few have shown these symptoms. strange yellow spots in random places top or bottom leaves, some very burnt looking leaves, and many brown curled tips on otherwise healthy looking leaves are shown in these pics, i really don't know what could be causing these problems, the lights aren't ever within 1ft of the plants so its not being burned from touching the lamps.

and the LAST post - problems with 2 mommy plants, some of the lower leaves are showing these symptoms. small yellow spots are appearing on many of the lower leaves, and again the brown tips are on the leaves (that problem is in all the plants, except the brand new clones) some of the yellow spots are quite prominent, and show between the veins. some leaves have the tips curling downwards as well


ANY help on deciphering what these various issues may be would be appreciated. if you need any other pics or more info about the method used for doing anything please ask i'll be happy to answer

watering 2 times a day is too much.
once a day at the most, maybe every other day.

and maybe a bigger pot for that first one

the first water is just a sprinkle in the morning to help counteract the generally high heat, not much at all. the most of the watering is at the end of the light cycle i don't think its a over water problem as very little is applied each time and the weight and dampness gets checked every time as well. they don't get watered unless they have dried out completely and the 4inch pots tend to release the moisture pretty quick. the seedlings/mothers don't get watered nearly as much since they aren't in a high heat environment

as for the size of pot, yeah we should be replanting the seedlings that might be a part of the problem but i definitely think theres some deeper issue somewhere that needs to be addressed

the worst issue the plants are having is the slightly brown tips on almost each plant. in this pic here it shows a budsicle that is doing great aside from the brown tips. i really wish i knew what was causing that!

what water are you using?

and i found this in the FAQ
"Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins."

those brown tips could be nute burn, how often do u fertilize? also twice daily watering is probably too much, practically you should water when the first few inches down into the soil are dry.

we rarely water twice a day, but do when the soil drys out completely . we're using ph 6.2-6.8 water. it could be a magnesium deficiency, but i hear molasses has that in it and we just got some tonight so we're gonna try that . we've fertilized the plants 2 times, total and they are reached the 2month point. once with the all purpose 202020 and once with bat guano. i was thinking nutes burn too we may have added too much guano... hard to say for sure though. thanks for the replies, keep them coming i appreciate all tips or ideas of what it might be .

another thing is that i hear our water is high in chlorine, we're also starting to let our water sit for 1-2 days before using it that might help a bit too since the high chlorine might be a part of the problem