New Grower Hi I'm a New Grow from Thailand

I forgot to tell you this guy already got some crystal on the top near the white hair too.I feel so tried to grow early him got stunt about 1-2 week and now problem again on my first grow . T T
 
problem

here after 12hr the tip are turn to brown and more discolor.I really don't know what is going on or Calcium or Magni def ? Is anyone out there help me out please. sorry for my English is not well.
 

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What medium is it your using? Soil? Soil less? Temps? rH? Lighting? Need just a bit more info, looks to actually be beginnings of nute burn and a ph lock out... Just a bit more info and I'm sure someone will come along with some more help...how far are the lights from the canopy? Just a couple questions to answer will give us enough info to steer you in the right direction.....
:Sharing One:
 
give them just water. it look's like nute burn from too much on the nute's. I would do 2 watering's with plain water then feed half or less of what you did last feed. do you supplement with cal/mag ? under an LED light you will need this.and your plant is flowering. don't worry about your English. it is 100% better than my Thai! :D
 
on second look it might just be cal/mag deficiency.
 
What medium is it your using? Soil? Soil less? Temps? rH? Lighting? Need just a bit more info, looks to actually be beginnings of nute burn and a ph lock out... Just a bit more info and I'm sure someone will come along with some more help...how far are the lights from the canopy? Just a couple questions to answer will give us enough info to steer you in the right direction.....
:Sharing One:

Hey,Thanks for your advise actually I post some of my info on first page but I will give you some here I grow In Soil , temp 24-30 C ,rH 50-80 and i'm, using 180w led light from china . and here my pic . I really want to solve the problem before it too late I don't want them get any stunt and Thank you for read my posts . :tiphat:
 

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Bingo! Typical stoner moment here and just saw your thread from the start, using coco eh? I think cal/mag def along with ph lock out, running coco ph should be 5.6 to 6.2 max, test your run off and see if you can figure out the ph of the coco... :karma Cloud:
 
give them just water. it look's like nute burn from too much on the nute's. I would do 2 watering's with plain water then feed half or less of what you did last feed. do you supplement with cal/mag ? under an LED light you will need this.and your plant is flowering. don't worry about your English. it is 100% better than my Thai! :D

Sawadee kub , Nice to heard you try to speak my language haha . and yeah I think you would be right I not really sure they got cal/mag in my fertz or not I use a wormcasting(1-0.5-1) and bat guano It a powder fertilizer yesterday when I saw tip turn to brown I gave some more nute about 2 tsp and yeah It very hard to get a good info fertilizer around here. and 1 more question I'm on flowering I should change nute to flowering right I will give bat guano (2-10-3)and a ocean fish fertz bloom mix with water .and yeah Kob kun kub :drool:
 
Bingo! Typical stoner moment here and just saw your thread from the start, using coco eh? I think cal/mag def along with ph lock out, running coco ph should be 5.6 to 6.2 max, test your run off and see if you can figure out the ph of the coco... :karma Cloud:
Um my soil mix is 90 soil coco 5 perlite 5. this pot It my first grow I know I would have problem with the root. and I'm tested the ph is around 6.5-7.5 and I'm never test ph'd water I'm using RO water would It be worse? I'm afraid they would die and Now they turn brown on tip and get inward too! would it be on Phosphorus Deficiency ? because I also got red stem ? and I didn't give bloom fertz yet. or it a cal/mag defi ?
 
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