kang420
Well-Known Member
I am not using city tap water, i have a spring well its very good to drink Ec of the water is 0.2 before any nutes are added
Plants dieing under blackstar240 (AGAIN!) help
- Thread starter kang420
- Start date
Luke OReilly
Member
I grow with LED's but all my research has lead me to believe that plants really do not like UV light. In very small amounts UV will stimulate THC production as the THC has the ability to absorb UV light, the plant produces the extra THC to protect its self. The problem with this is that some LED grow light companies are putting too much and the wrong wavelength of UV in their lights. This could easily cause the damage that I see in your pictures. Please do not give up on LED's just watch what spectrum you are getting and avoid the UV and IR models. UV LED's on the market are 380nm-400nm you need a much shorter wavelength (280nm) for any positive effects. IR LED's, again proven to stimulate budding and resin production are very unstable in 3 watt LED grow lights and usually burn out within a few days, good thing they did not produce any visible light to begin with or you might notice. Instead find a light with Red, Blue and a full spectrum white, the white will give off small amounts of both UV and IR and this will make your plants happy and productive. I know it is tempting to get those 10 band lights but you will actually get much better growth out of a nice 5 band. Why do you think NASA only uses 4 bands? Maybe with the current budget cut backs it is all the can afford?
Think about it.
Think about it.
jubiare
Active Member
looking bad fella, so sorry
how far are u with flowering? gotta do something appropriate very soon! Have u checked on your run off with ppm pen? If what comes out is crazy high, you got salt build up (lockout)! And something like clearex or canna flush are what you need (avoiding too much flushing about)......
if your run off is just slightly higher than what goes in, it will be a different story! Also plants like that are gonna be very susceptible to diseases, that's what happened to me last time! wish you the best of luck mate
how far are u with flowering? gotta do something appropriate very soon! Have u checked on your run off with ppm pen? If what comes out is crazy high, you got salt build up (lockout)! And something like clearex or canna flush are what you need (avoiding too much flushing about)......if your run off is just slightly higher than what goes in, it will be a different story! Also plants like that are gonna be very susceptible to diseases, that's what happened to me last time! wish you the best of luck mate
PSUAGRO.
Well-Known Member
Did you wash your cocco before using it???.............it's definitely a lockout but did you check for pests??....i would still run straight aerated water a couple times before reintruducing any nutes IMO
kang420
Well-Known Member
I think ive found my problem lol (Again) after alot more thought of salt build up and the plant getting worse everyday i decided to flush them and test the run off EC, the runoff was 3.6! what the fuck fuck? hows that even possible keeping the ec under 2.0 when feeding lol anyroad i drove 20 liters of water into the poor girl and topped it off with 2 liters of very light food Ec 1.3, hopefully i will see improvements soonlooking bad fella, so sorry
if your run off is just slightly higher than what goes in, it will be a different story! Also plants like that are gonna be very susceptible to diseases, that's what happened to me last time! wish you the best of luck mate
Thanks jubiare good advise testing the run off cause i had no idea it could be that
EDIT psuagro yes i wash the coco well before use as i was also told that would cause problems
kang420
Well-Known Member
I hope so mate i really do, tell me something if you dont mind, should i be feeding every watering with coco or should i feed then water then feed then water? ive been told to use canna A&B every watering, what do you think is causing the salt built up am i using too much?
jubiare
Active Member
well done! One more thing, check on the girls with this ec 1.3 ... see how they respond ... you could even give only water sometimes in between (bubbled water as psuagro suggested) .... and/or even less nutes? maybe they need a little recovery time before tolerating normal feed? Less is more for you now .... (and for me, I am into the same boat). wish you a great recovery
kang420
Well-Known Member
Heres an update guys, i got the aquarium pump and airstone and after a few hours or having it in the ph'd water ( 5.8 ) i gave the girls some and i added my second blackstar 240 so both leds and a 45 watt cfl are on. this morning after looking again it seems to be getting worse again! a few lower leaves are showing the same signs and a few middle leaves have gotten worse, should i keep the two leds on or just one or what should i do? the first pic is before the second led was added and the rest are new today after the second led was added
dank smoker420
Well-Known Member
i see that you use purified water. do you supplement with cal-mag?
dank smoker420
Well-Known Member
i see you have ph'd water. do you know the ph of the soil?
i saw the first post haha 5.8ph. might be a little low. it should be around 6.5-7 if you have some crushed dolomite lime mixing some in the topsoil could help buffer the ph. did you add anything to the coco other than perlite?
this could be helpful
http://www.thctalk.com/cannabis-forum/showthread.php?11726-Ph-Lockout-Chart
you can tell from the charts that it is harder for the plant to absorb NPK with a ph of 5.5 and the calcium and magnesium cannot be absorbs with a ph that low
i saw the first post haha 5.8ph. might be a little low. it should be around 6.5-7 if you have some crushed dolomite lime mixing some in the topsoil could help buffer the ph. did you add anything to the coco other than perlite?
this could be helpful
http://www.thctalk.com/cannabis-forum/showthread.php?11726-Ph-Lockout-Chart
you can tell from the charts that it is harder for the plant to absorb NPK with a ph of 5.5 and the calcium and magnesium cannot be absorbs with a ph that low
budman111
Well-Known Member
holy shit thats only about 1 foot...wow talk about frying plants!
dank smoker420
Well-Known Member
not with a blackstar 240. its using less energy than a pg-180 and my pg is probably less than a foot away and no bleaching. if you get bleaching than you know your light is to close but it happens at the tops of the plants not at the lower fan leaves.
budman111
Well-Known Member
ok, i see now, i got a vipar led and those are crazy powefull shit dude, i see burning before bleaching it will burn within a few feet!
kang420
Well-Known Member
I am using coco not soil my ph need to be 5.8 its not light bleaching the top of the plant is fine
dank smoker420
Well-Known Member
you have coco coir. it comes in a brick right? hydroponics is suposse to be 5.8ph coco falls in the same as soil.
PSUAGRO.
Well-Known Member
No straight cocco can be lower than soil/ actually suggested as long as you run cocco based ferts that work at that ph(which he has)............well kang once leaves get lockout/def damage they will continue to get worse and finally die off most of the time.......but your new growth seems ok to you???that should be your main concern as of now...........