[Week 4] It happen after nitrogen toxicity.

i've read many thread but hadnt met the solution yet, so I'm open this thread looking for help. Thanks.



. Indoor grow
. 1 week changing water
. Hydroponic grow
. Week 4 of flower
. Ph 5,7 nut mix and rereading at 6,2 one day after
. ppm at 900 advanced nutrients grand master recipe
. This is plant from clone
. LED high red 3000k 250W
. Lux reading at 20" is 40000 lx
. temp light on 27c - off 18c
. humid 46~60

Please help, thanks a lot.

HQHQ said:

i've read many thread but hadnt met the solution yet, so I'm open this thread looking for help. Thanks.

View attachment 4354147 View attachment 4354148
View attachment 4354150
. Indoor grow
. 1 week changing water
. Hydroponic grow
. Week 4 of flower
. Ph 5,7 nut mix and rereading at 6,2 one day after
. ppm at 900 advanced nutrients grand master recipe
. This is plant from clone
. LED high red 3000k 250W
. Lux reading at 20" is 40000 lx
. temp light on 27c - off 18c
. humid 46~60

Please help, thanks a lot.

Click to expand...

Switch to soil.

I see N deficiency, P deficiency, K deficiency, Mg Deficiency along with N tox symptoms.

This leads me to believe your pH calibration and adjustment is WAY OFF!

View attachment 4354144

jondamon said:

I see N deficiency, P deficiency, K deficiency, Mg Deficiency along with N tox symptoms.

This leads me to believe your pH calibration and adjustment is WAY OFF!

Click to expand...

Thank for your reply i'm recalibrating my pH pen now.

hotrodharley said:

Switch to soil.

Click to expand...

Done before, the result really good, i'm gonna experience Hydro this round.

HQHQ said:

View attachment 4354144


Thank for your reply i'm recalibrating my pH pen now.

Click to expand...

Use litmus paper. Cheaper. No batteries and never needs calibration. Just a suggestion.

hotrodharley said:

Use litmus paper. Cheaper. No batteries and never needs calibration. Just a suggestion.

Click to expand...

poor me i know it but didnt think of it. cheap but work thanks you Hotrodharley

For those reading later:

“Testing your hydroponic nutrient solution with litmus test strips can be one of the cheapest ways of checking the pH. The strips contain a pH-sensitive dye that changes color when dipped into your nutrient solution. The strip is then compared to a color shade chart to determine the pH reading.”

Trust me here - it’s more than adequate for our purposes including in actual hydroponics. Save your money and use it to buy a real EC meter. Hanna is again more than adequate and the brand is used in reference labs and research facilities around the world. Blue Labs is very good but you don’t need to spend that much for good results.


http://www.nosoilsolutions.com/3-ways-measure-ph-nutrient-solution/