Hydro Problem- cant diagnose

T

tdoubleyou

Member
I have two tables feeding 32 plants (16 per), everything is fine until plant roots begin to show from rockwool. At which point the problems begin. all plants show the following signs of stress.

1) red stems
2) bottom leaves drying up (crispy)
3) top leaves are drooping and slightly curled under
4) growth stops

I have researched potential problems but am having a difficult time determining which problem it could be (if only one).

I have experience with this set-up and have not encountered such problems in the past. I am wondering if it could be contamination within the system? or something else. I am having difficulty keeping PH within the desired range as I check every 12 hours and it seems to be rising quickly ( up to 6.5-7.0 in some cases)

If you need more info just ask.
 
C

cruzer101

Well-Known Member
Sounds to me like your roots are exposed and you are air pruning the plants.
You mention you have had experence with this setup, was it the same strain?
 
moash

moash

New Member
cruzer101 said:
Sounds to me like your roots are exposed and you are air pruning the plants.
You mention you have had experence with this setup, was it the same strain?
Click to expand...
sounds about right
try covering the top of the tables or fill the spaces with hydroton
 
moash

moash

New Member
can u put pics?
if the ph is rising alot then u could not be feeding it enough
when the plants use the food it throws off the ph
a ppm meter would be helpful in this case
have u changed the res lately?
 
T

tdoubleyou

Member
change res twice weekly. will post pics but cannot untill tomorrow. Even If I were not feeding enough it shouldnt kill the plants right?
 
amsterdayum

amsterdayum

Well-Known Member
moash said:
can u put pics?
if the ph is rising alot then u could not be feeding it enough
when the plants use the food it throws off the ph
a ppm meter would be helpful in this case
have u changed the res lately?
Click to expand...

agreed, i had an issue similar to his and it turned out to be a calcium prob and i was thinkin at the time wtf am i doing diff then i realized i moved and the watter here has little to no calcium a meter would most likely give u an idea of what the prob is...
 
T

tdoubleyou

Member
amsterdayum said:
agreed, i had an issue similar to his and it turned out to be a calcium prob and i was thinkin at the time wtf am i doing diff then i realized i moved and the watter here has little to no calcium a meter would most likely give u an idea of what the prob is...
Click to expand...

Here are the pics... and some more info
..water cycle is ON-30 min OFF-90 min


I have also just moved to new location?
Just purchased ppm meter, what reading should I get?
 

Attachments

T

tdoubleyou

Member
I tested and had over 600 ppm. I started a new res with significantly lower ppm @ 260, hopfully they will begin to show improvement.
 
C

cruzer101

Well-Known Member
Looks to me like the nutrients stored in the lower leaf is constantly going to replace the roots. If you do not have any medium under there to keep it damp then I would suggest you shorten your off time. Try 15 min on and 30 min off if you are just watering the roots.
 
You must log in or register to reply here.
Top