Your guys thoughts

hey guys im new here but i have been growing for a while, but i have come across this problem. I can't determine if this is a lack of nute or over fert.
this has progressed worse over the past week or so, i am 1.5 weeks into flowering.
i run 600w lamps, room temp is 72 to 78, humidity is 45 55%, i am in soil and my ph has been between 6 to 6.5...
my last feed was wed last week and was 990 ppm , i use GH flora series and i flushed fri with straight water and fed today at 1200ppm.. i started using kabloom last week as well..

i have folier fed with growth plus a few times..
these symptoms are mainly on the bigger fan leaves and are not near the tops but mainly on the mid part of the plants.. about 8 are effected..
I will add that i have another group of plants same strain ak47 that are smaller in size but were giving the identical ppm and watering, i do it at same time and they are not affected...
if i left anything out let me know i apreciate the help guys...

looks like a calcium deficiency to me. Have you recently used RO water or bottled water?

no i use tap water,
but i have used water that collects from the dehu, hmmmm, only about 20 litres worth, ph was 6ish...
think maybe that could be it.. i always just dump the water into my res..

ok so this is what i seen last nite.Not only are my leaves shriviling up like an old mans nuts, i now have these random f*$kin spots... Ive looked for bugs and dont find any. i did spray 3 days ago with an organic bug spray just cause i want to keep up on it.
sorry about takin the pics under the lights , but the spots appear to be yellowy white, light a lighter yellow. they almost look like bleach spots on clothing, not damage to the leaf just discolour..
any help guys id apreciate.

so these were takin last night under diff light to hope someone here will at least point me into some right direction.. flushed the shit out of them last night.. checked the run off and the ph was good 6.5 but the ppm was 1900.. yikes.. perhaps that was just building up in the soil hey..my prob is my table sysytem i have has a shitty run off so when i water i usually dont water to the point where i get much water out of the bottoms of the pot..what do you think and again, this is only seen in the older plants..the younger ones seem to be ok and i gave them the exact same amount of nutes last feeding.. its strange..

are you letting your tap water sit over night.


town treated tap water is full of flouride chlorine salts, and other minerals from your which can be left behind as residue in your medium and on your plants. this can kill plants over time. if your going to use tap water let it sit 24 hours uncovered with an airstone in it to keep it oxygenated.

this can cause white spots on your leaves and white residue on your medium & pots over time

ya i use tap water.. ill let it sit next time but do you think its really causing that much damage to those plants? man some of them look like they been hit with a lighter..thanks

over time tap water will KILL your plants

period

thats why you HAVE to let it sit

Jbrowngreen said:

over time tap water will KILL your plants

period

thats why you HAVE to let it sit

Click to expand...

ok, thanks man, i apreciate that. thanks for the tip.. so you think thats whats causing the white spots?

indeed. hard water has a high ppm as well be weary of that when you mix your nutes too its easy to end up with nute burn that way