ok i will order ppm reader this is my first time in hydro i normally use coco no messing around my neighbour decided to do hydro it was hes first time i left him to it he didnt have a clue he was glugging nutes in and hes turned out puka they was 6ft tall
i was changing res every 7 days the past week ive been hand watering to see if that helps still empty tank once a week i give it a scrub with a sponge weekly also i measure with syringe and use ph metre i let a friend stop at my place while i was away and he got the gnat problem every summer i get hundred in a day on windowsill they dont go anywhere but window and die straight away i think the enviroment has activated there nest again ive tried treating with no success theres only about gnats 50 in 2 weeks in there i didnt have clay pebbles untill a week in
i did a flush with h202 i got 3% food grade i tested on one first then the rest i did that 4 days ago i feed once per day and get 20% run off i think he was using coco i do a 3 litre mix and feed just over half so 1.5ltre between all 4 dont no if thats enough
Leaves eventually dry down and die.You may have had a P def from the very beginning if your Rockwool isn’t buffered. Your nutrient feed is fine if its 6pH. But your RW raises the pH and causes the major drift ups, and then high pH locks Phosphorus (and other micro nutrients) out. Google more about Phosphorus deficiency and compare them to yours
Cal/Mag could make it even worse if there is any excessive amounts of Calcium.
your a genius how did u no when i first got my cuttings i had no way of testing as i didnt have ph metre i no that the rockwool was ph 7 because i ordered a ph checked nute sollution it was 7 now i use ph down to lower ph the first 5 days the ph was not adjusted my friend said he had a truncheon i could use but never brought it round i assumed that when i flushed it would fix the rockwool ive only just realised u have to leave rockwool in quarter nute sollution for so many hours witch i did but with to high ph not sure if rockwool would have increased ph when sat in sollution it could have raised to 7.5or8 do u think it will get better after next flush im not sure if the ph would have rised from what was coming from cube when soaked ive put hydroton directly in top tray a friend done about 30 like it they was all fine thanks for help pal they are clones not seed they was in this round pellet soil this is what they was rooted inHello agedmaster! Your friend @Bill284 asked me if I could take a look at here.
First of all I’m lil confused about your medium. I’m seeing a Rockwool cube (or at least a wrap of it?) and hydroton on top of it. Have you germinated your plants in RW? - Has it grown root mass inside the rock wool?
Because if youre having most of your root mass inside the rockwool then it could be simple as un buffered RW slab. Rock wool tends to have naturally very high pH, at around ~8. And that could explain why your run off pH keeps jumpin up. And then, 7 pH or above causes that roots can not absorb some of the macro- and micro nutrients. Which could explain the foliar symptoms. As they show up as a deficiency.
For example Phosphorus being best available for the roots in hydro between 5.3-6.3 pH. And having constant 7 pH could cause Phosphorus to lockout. That would explain purple petioles and those deep bluish, almost black blotches.
Rest of your foliar symptoms such as chlorosis, discoloration and dead spots could be just because of the nutrient imbalansion. Or actually late stage phosphorus deficiency has a similar indication, just googled.
As the worst leaves looks to be mid to lower leaves we could assume that it is a mobile macro nutrient and thus that Phosphorus. a Phosphorus lockout.
I had a very sime kind of situation with my last DWC grow. Or at least I think it was because of the un buffered RW slab which threw pH the fuck out and caused massive damage on the foliage.
This backs up my hunch
You may have had a P def from the very beginning if your Rockwool isn’t buffered. Your nutrient feed is fine if its 6pH. But your RW raises the pH and causes the major drift ups, and then high pH locks Phosphorus (and other micro nutrients) out. Google more about Phosphorus deficiency and compare them to yours
Cal/Mag could make it even worse if there is any excessive amounts of Calcium.
Excessive amounts of Calcium decreases other nutrients availability, for example Phosphates.
So to start fixing the problem you’d first try to buffer your Rockwool to around 5.8-6 pH. As the plant has already grown it might be a little tricky… You could try for example Canna’s FLUSH solution to lower your Rockwool pH. Canna flush is 3.8 pH concentrate that can be used for example to wash used coco or other soiless mediums.
Then you could lower your reservoir pH also down to 5.5 until you start seeing progress.
Your dripping setup and timer looks to be good on point, prob don’t want to change those routines – youre having nice tight node spacing and your young buds looks like growing even tho youre having issues with pH.
Hope this helps at all.
thanks pal very much appretiated
u got it bang on i was giving lower dose of calmag 1ml per ltr instead of 2 i will start giving 2 and i give them 10ml bloom feed per 3 ltr i will try 15ml bloom feed and 6 ml calmag thanks for advice i will also add calmag first as advised by bill thank you both and when i flush should it be with plain water or quarter feed if plain water can i give feed straight after
If youre using beneficials such as Hydroguard, Canna zym or rhizotonic for the roots, then I’d apply that on the ~5.5pH flush water.
ok pal will do i use rhizotonic and cannazym thanks alot
Pluck the neighbors? Go for it if it will help.
Maybe it is me or maybe the angle of the camera in relation to the leaves and the light source but I doubt it. It looks like a start to Powdery Mildew in the photos in msg #28.
