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very nice you are in the sweet spot I would not reduce or increase the ec, as long the transpiration stay the same (vpd) what is the strain, is that cali genetics ? Because I get the same slight curling on edges on Ice cream cake These strains seems sensitive to wind/low RH. It a very small...

using hvac with venting is a non sense the easiest in this space would be to buy a CO2 controller and a bottle and plug it set it at 500ppm if you want to stay around atmospheric levels

calmag deficiency does not exist its either calcium deficiency or magnesium deficiency (very easy to tel apart) you don't have neither of the two its more a buffering issue (pH) your water is very soft canna is designed for hard water So you need to add a buffer to your solution I usually...

do not use reverse osmosis water thats is your issue what is the start EC of your water (out the tap) ? 0.8mS of nutrients is not enough I use 3.0mS in veg with rockwool with great results (my tap measure 1ms and I add 2ms of feed over it) when the plants start to grow fast and drink everyday...

any ph down containing nitric acid, house n garden for exemple

yes I had it. even if I don't like to call it hplvd. My plants were growing vigorously during vegetative stage but with a ugly pattern there was also some mosaic pattern appearing on one or two leaves, but very stealth exactly like this (image found on the net) here is a great video...

your plants do not have hplvd it has a characteristic pattern easily recognisable when you had it long enough (lateral branching, like creepers)

yes 70% isnt that high they get this all the time at night in the wild

you can imagine your medium as a sponge you never want it neither soaked with water, or neither dryed out just to keep it watered enough to give easy access to water for the plant, but not wet, because it will deprive roots fro oxygen overly wet substrate will produce algae, bad fungi, gnats etc

hard to tell without seeing the plants ideally you want to let the soil take a good breath before watering again this will keep it free from gnats and other nasties when you judge the pots feel lighter, water half a liter of solution per plant if it takes longer than two or tree days to need...

it is too early to water to runoff you must start slow and when the plants will drink everyday you will be able to water to runoff dont make it bone dry neither

you can definitely overwater in soil when the plant is not well estaablished if the water content of your soil gets too high, water will replace oxygen and your medium will start to get anaerobic (not good) by their size i would not give more than half a liter of water per gallon of soil...

yeah nutrients precipitate under 5 degree c usually 8 degree C minimum written on the bottle I always order nutrients directly from the manufacturer, even if it cost 10 pennies more Some unscrupulous shops (I have a redlist) do not hesitate to send bottles waiting on their shelf since 10 years...

to uninstal an AC unit you need to bring the refrigerent back to condenser (pump down) to do it properly you have to connect the manometers on the outdoor unit, can you do this on you 'diy' AC? it can be done "by ear" but its very hazardous to bring the fluid back to the condenser you will...

just a preflower

in the USA the platinium cut can be easily found i think otherwise nirvana sells master kush in regular.. 20 euros for 10 seeds.. trying this with their amnesia haze, jock horror RN pop a few packs,directly in 1 gal pots when sprouted. little water to start. clones everyone apex (in solo cup the...

these are mostly clone only IMO you can try to find the clones (beware of hplvd..) or make your own selecta from reg seeds, and keep the winner among several packs

except when you enter the room you dont have to vent the room its broscience no need to copy paste text they dont know what they talk about nothing beats experience, do your tests, one day you will turn off the exhaust and you will notice the plants will grow as good as before if not better and...