Seedling problem, if someone can help me to diagnose

[zeusdraco]

Hello everyone,

I am just done finishing my new RDWC 10 x 8 gallon bucket and 4-5 day ago put my seedling in the bucket, althrough most seem to growth slowly , i see some weird problem on them which i cannot seem to find out whats going on.

Room Temp : 24 degree

Water Temp: 21 degree with water chiller

Light intensity 480w draw led reduced to 25% at 36 inch high ( 200 umol * web say 200-400 umol during seedling stage ) they still on 24 h light for now, i didnt want them to growth too fast tall for now.

Humidity level : 65% with the RH50 auto feeded humidifier.

2 air stone in each bucket.

PH using taurus auto ph balancer: 5.46 and it never move at all

Nutrient: I didnt feed them at all the first week 1/2 using rapid rooter, but they were starting to show deficiencity before put them into my RDWC so i used:

1. Osmose water 60 gallon
2.Hydroguard about 30 ml
3.Flying skull Z9 ( canadien version ) 30ml of each part
4.Silicia half the recommanded dose 1ml per litter
5.GH floraNova Growth recommanded 0.5 per litter for seedling, i went with 0.3 approx per litter.
6. Cal/Mag from GH , 1 ml per litter.

Total PPM 406

I used to feed them from the top 1 time per day to help root to hit the water, last night i noticed most had 1 root that hitted the water so i stopped to feed them manualy since 24h.

I put 3 picture of 3 diff plant out of the 10, 8 purple punch and 2 white rhino.

Sorry for my english i am french canadien.

Thx for any input or advice guys.

Zeusdraco

 

[zeusdraco]

could it be phophorus problem ? I couldnt find anything else similar to my problem yet.

 

[TorturedSoul]

Any reason you've adjusted the pH lower than most run in a hydroponic setup (and, especially, hold it there instead of allowing it to drift upwards to around 5-8 to 5.9)?

 

[zeusdraco]

I am using taurus PH balancer, it does the job without me doing anything, 5.46 shouldnt cause problem as it is very close to 5.5, but yes i usualy run in veg at 5.8-6.0. Most of the site i am lurking recommend 5.5-5.8

 

[zeusdraco]

Its sure getting worse, starting to think its nutrient burn ?

 

[zeusdraco]

I have removed 2/3 of my water to lower the ppm to 200, missread at 400ppm somewhere, adding osmosed water. I hope this will solve my problem and they be able to recover.

 

[NuttyProfessor]

5.4 is low so could be locking out , them leaves do look lime they are showing lock out

go up 5.7/5.8




lock out example