Problem??

[reeflounge]

DWC System
1000watt MH day 30 of vegative stage from seed
strain is skunk special feminized
18/6 light schedule

Humidity 31%
Temp 85 degrees
Room is sealed, and kept at 1250 PPM co2
water temp 68-72
ppm is 950 tds factor .7 using 0-8-16 GH, ro'd water is 6.8 with ppm of 10
ph is 5.9

What looks the problem below? Anything would be greatly appriciated! I have had this problem threw the whole grow.. any ideas? The bottom leaves are now so bad they are crumbling when i touch them..

karten dude: Image is added
DWC System
1000watt MH day 30 of vegative stage from seed
strain is skunk special feminized
18/6 light schedule

Humidity 31%
Temp 85 degrees
Room is sealed, and kept at 1250 PPM co2
water temp 68-72
ppm is 950 tds factor .7 using 0-8-16 GH, ro'd water is 6.8 with ppm of 10
ph is 5.9

What looks the problem below? Anything would be greatly appriciated! I have had this problem threw the whole grow.. any ideas? The bottom leaves are now so bad they are crumbling when i touch them..

 

[Guest]

reeflounge:

I think you are burning them with your nutes... Try to lower PPM of your nutes.. Maybe too much P....

Peace and love,
Agnes

 

[reeflounge]

I tried that and it didn't make adifference.. just slowed growth

 

[Guest]

looks like a mag def.i would suggest supplement your nutes with some mag should clear it up

 

[reeflounge]

why do you say that? why does it look like a magnesium prob? Anyone a little more experience got an opinion?

 

[reeflounge]

no other opinions?

 

[mace_ecam]

ppm is 950 tds factor .7 using 0-8-16 GH, ro'd water is 6.8 with ppm of 10

something is wrong, with a .5 conversion you should have ca. 1000ppm, with a .7 conversion, you should have 1400ppm. check you conversion factor it should be .5, not .7!

Humidity 31%

thats too low, together with a bit of IR it can lead to what you are seeing, by your pics it could be moisture stress(rolled up edges), increase your RH to 50% (wet towels etc., reduce air circulation).

mace

 

[reeflounge]

what is IR? Thank you for the replies..

 

[mace_ecam]

IR stands for infrared radiation, also known as radiant heat.
IR is emmited by the bulb for instance.

whats your conversion factor?

 

[reeflounge]

TDS Factor is .7, I just switched to 12 12 yesterday, plants are all about 14 inches tall.. ppm is 1080, ph is 5.7 what are your thoughts? I got the RH in the 50% rang..

 

[mace_ecam]

your RH was low, now its better for vegging plants

but your nutes... they ain't correct, you aren't using enough of them.
0-8-16 will give you a TDS of 1334ppm. Because of that, you might have a Mg def.

Going 12/12 with sick plants is usually not the best, since they won't recover.
i would increase the nutes and stay in 18/6 for a few more days, after 2-3 days you should see an improvement.

gl,

mace

 

[reeflounge]

They are starting to look better, but I had already went into 12/12 before i upped the RH. I pulled the lower leaves that were looking bad, and everything seems to be going good. I now have the HPS in, and its time for me to get a carbon sccrubber going now lol. I have also been misting the plants with 1/2 strength water.. iunno if that was a bad idea or not.. hopefully not lol.. the RH is between 53% and 67%. I also upped the nuttrients.. I am now at 1280.. 6.2 ph.. i'll graddually start to go up more weekly on the nutes. Thanks for your help so far...

 

[Verite]

Imo you are going the wrong way with the ph. Time will tell pretty quick. 5.9-6.2 is on the high side for hydro.

 

[mace_ecam]

Verite has a good point, when you use stronger nutes, your pH should get lower, not higher.

0-8-16 should have an pH around 5.5ish in RO, meaning no further pH adjustments are needed.
Why is yours so high reeflounge? When in doubt, dump the res and refill.

i wouldn't do the misting, 50% RH is fine, if you're overdoing it, you'll end up with mold