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No idea what is going on
- Thread starter Blackrain
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First questions must be answered, at the infirmary section the first sticky thread from Mossy...
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Sorry I was in a rush to post it just before I went to work.
Problem: Browning on the leaves and curling upwards, some even going yellow
Medium/grow method: Coco
Feed: and supplements used: Biobizz grow/bloom and Shogun Calmag
water source: Filtered through a fish tank at around 6ph
Strain/age: 7 weeks old / Auto Jack
light used: CFL300
Climate: 20 Degrees 40x40 tent with 40-50% humidity
Additional info: I hadn't watered her in about a week and she was bone dry, I figured giving her water would fix it but so far no luck.
Problem: Browning on the leaves and curling upwards, some even going yellow
Medium/grow method: Coco
Feed: and supplements used: Biobizz grow/bloom and Shogun Calmag
water source: Filtered through a fish tank at around 6ph
Strain/age: 7 weeks old / Auto Jack
light used: CFL300
Climate: 20 Degrees 40x40 tent with 40-50% humidity
Additional info: I hadn't watered her in about a week and she was bone dry, I figured giving her water would fix it but so far no luck.
First off your temp is to low,should be nearer to 78 or 80f.Growing in coco your ph should be around 5.8 for your intake water.What dosage to you give your cal/mag?Being that dry for that long might have damaged the upper new growth and the only thing is to fully water it and see if the foliage comes back normal but it may not.
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I'll try bring the temps up as much as I can, I tend to give it 1ml of calmag sometimes 2ml but have been tempted to up it to 3, I gave her a 5L watering and had a nice bit of run off, hopefully she pulls through for me as it's my first grow and has been great until now. Will maybe update when I arrive home.
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- fine-ass '22 harvest!
.... 
-- looks like a P defc. issue,.. but so odd to see it hit the tops like that,... drying out like that can really screw things up, starting with the roots,.. pH will go way off, causing burn issues for both roots and foliage,... this is not a Ca-Mg problem at all,...
Are you familiar with coco growing? There are a lot of do's and don't's,... coco cannot be treated like true soil, or nothing but shitshow is to be expected-
.... we need more info: what size pots?... are you running drain-to-waste, getting 15-20% run-off every time? frequency of feeding?- (never water alone!).... any run-off EC/TDS readings? In-pot pH?
... you need to get the RH% more than the temp's, though both raised will help even more,...
What else is in that fish tank water? Any meds, algicides,...?
-- looks like a P defc. issue,.. but so odd to see it hit the tops like that,... drying out like that can really screw things up, starting with the roots,.. pH will go way off, causing burn issues for both roots and foliage,... this is not a Ca-Mg problem at all,...Are you familiar with coco growing? There are a lot of do's and don't's,... coco cannot be treated like true soil, or nothing but shitshow is to be expected-
.... we need more info: what size pots?... are you running drain-to-waste, getting 15-20% run-off every time? frequency of feeding?- (never water alone!).... any run-off EC/TDS readings? In-pot pH? ... you need to get the RH% more than the temp's, though both raised will help even more,...
What else is in that fish tank water? Any meds, algicides,...?
(
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that bites! 
...well, join the "murder" club mate! 
... there's going to be some roadkill while climbing that learning curve! I think more than that was behind this,... coco is a particular medium to use mate, are you well researched on it? If you are new to growing, coco is a tough way to start,.. it can be a fantastic meduim when understood and done right, monsters can be made in small pots, IF you have the time or set-up to deal with it,.. it has a lot in common with hydro, more so than soil,... Consider trying an auto-type supersoil, like Mephisto/GBD add-in soil amendment (if you're state-side)... just mix it in high quality, mild soil according to directions,...basically you make a rich bottom layer, normal top, and it's water only from there!... Some folks still do a little supplemental feeding with organic nutes to boost PK during bloom,.... using soil inoculants is recommended too,key to making this type soil do it's best... In EU, Biotabs is a great product too (Mephisto uses them at their farm) 
.... there's a soil called SoHum too, also a water only "super soil",....Similar threads
