would love a advice here, what my plants need?

sorry, really wanted to avoid this but really running in to a problem i cant really figgure out.

I started a thread allready, but thsi turns in to a serious problem so i allow myself to post here too.

This is quoted from my thread:
https://www.rollitup.org/t/how-to-get-clones-well-started-in-a-dwc.937925/#post-13457913

EC is going down very slow, PH is at 6.1 right now had to add a bit ph- (GH powder)
Even i used pure RO, so looks like i should avoid any carbonates in the water, or not mixing tap water in.
I added calcium sulfate and magnesium sulfate at start with the maxigrow (40g magigrow, ca. 6g calcium sulfate 5g magnesium sulfate on 40l)
This gave me a EC of almost 1.4 , i topped of a half gallon RO Water (less then 2l) that lowered it 0.03 points, Plants seem to consume, 24h later i am at slight above 1.3 now, maybe a tad too low or too much, idk atm?

EDIT -never mind...just saw you pH is 6.1....

I wish I could offer you some advice. I grow in soil.

cobshopgrow said:

View attachment 3920350 View attachment 3920352 View attachment 3920351 sorry, really wanted to avoid this but really running in to a problem i cant really figgure out.

I started a thread allready, but thsi turns in to a serious problem so i allow myself to post here too.

This is quoted from my thread:
https://www.rollitup.org/t/how-to-get-clones-well-started-in-a-dwc.937925/#post-13457913

EC is going down very slow, PH is at 6.1 right now had to add a bit ph- (GH powder)
Even i used pure RO, so looks like i should avoid any carbonates in the water, or not mixing tap water in.
I added calcium sulfate and magnesium sulfate at start with the maxigrow (40g magigrow, ca. 6g calcium sulfate 5g magnesium sulfate on 40l)
This gave me a EC of almost 1.4 , i topped of a half gallon RO Water (less then 2l) that lowered it 0.03 points, Plants seem to consume, 24h later i am at slight above 1.3 now, maybe a tad too low or too much, idk atm?

Click to expand...

how may gallons? are you mixing or adding the
40gram maxi
6 grams calcium sulfate
5 grams magnesium sulfate

look at the label on the maxi grow

tell me how much % of sulfur, calcium and magnesium is listed on the label

does it contain all of these?
zinc
boron
manganese
iron
moly
copper

im trying to see if my memory is correct
for some reason I have a memory of the maxigrow missing essential micro elements
but I could be remembering incorrectly

i put that on 40 liters, thats roughly 10-11 gallons.
My intention was to keep it low, the recommended dosage is even higher.
Maxigrow gave me 1.1 and the calcium and magnesium gave me a extra 0.3 so 1.4 EC total (btw i hate ppm, no one writes his conversion rate).
Nice thing for GH products, there is everything listed.
http://gh.growgh.com/docs/LABELS/maxigro.pdf
Was using RO so that isnt a miracle too.

I mean, calcium is def. it seems, i just read uptake is best from 6.2, so i may will just let it go above 6.2.
Ideas are really welcome
I also added 12g more maxigrow (EC/PPM was sinking and still is), well, i may loose them idk.
That gave me 1.59 EC
Feel like a young boy overcaring and killing his first soil plants, haha.
I have no problems growing on cocos, but this is the first time DWC and also GHE ferts, luckily it is just a hobby and i am still in veg, so as long something survive i can let them recover a bit.
What i wonder most about is that they did well in 1 gallon, bad maintained, lol.
So my first impression was DWC is doable, could just become better.

looking at your nutes

the first mix you mentioned was pretty close
10 gallons
40gram maxi
6 grams calcium sulfate
5 grams magnesium sulfate

adding another 12grams of maxi was probably a mistake

10 gallons
40gram maxi
6 grams calcium sulfate
5 grams magnesium sulfate

the way your mixing (above) is very close to good
this mix is extremely high in sulfur and a bit high on calcium
having said that I don't think either is related to your issue

I would recommend you change your mix to;
per gallon
4 grams maxi grow (40 grams in 10 gallons)
0.3 grams calcium sulfate (3 grams in 10 gallons)
0.7 grams Epsom salt (7 grams in 10 gallons)

doing this will lower your calcium and sulfur and raise your magnesium so that you get the proper ratio between K: Ca : Mg

these three elements compete for uptake and having them in a proper ratio will avoid potential of lock out in your future

again
nothing ive said above is related to the issue
its just a good look at your fertilizer to make sure its good or close to good, and it is

as to the problem;
I cant say with 100% certainty
but I suspect your issue is iron def

at 4 grams of maxigrow and an iron content of 0.12% that translates to 1.2ppm of iron which is not extremely low but its definitely at the bottom

your target EC of 1.2 or 1.3 sounds good

im betting if you go over that you might start to see your EC rise and not fall inside the res

if the issue is indeed iron

youll need to source an iron supplement

for example you could get calmag to get some iron
and mix it like this;

per gallon
maxigrow 4grams
calmag 3 mls
magnesium sulfate 0.5 grams (1/8 tsp)

void the use of the calcium sulfate you wont need

this mix will bump your iron up to 2ppm which is better

thank you, do you have recommended ppms for me maybe?
veg and bloom?
i am able to use hydrobuddy a bit, but haven found the final formula for me, especially not for DWC.
Interessting that you recommend more epsom salt, will check that out.
Normally the maxigrow should do it on tis own.

I know that i get a relative high sulfur level, but (for whatever reason) cant get calmag in any local store here.
Also my tap water have a even higher sulfur level then my mix now have.

It is a bit painfull ,but it looks like i got root rot, within 24h... that was quick, quicker then i could check the roots lol.
I added some bennies, (from TNC, Mykos and Bacterias), looks like that was the right track.
Have a bennies tea brewing since yesterday and infection isnt that bad i think.

The healthy parts of the plant (well they look mostly healthy) seems to be good with the 1.6 EC, stayed almost stable the whole day, tendency to get lower.
PH is a rock solid 6, think that is quite ok.
Well i will see if they recover, if not i startover, but after they did so well in the clone bubbler i am a bit pi****d.
It is not that i didnt thought about this option first, but all where nice a few hours before.

1.6 sounds high to me ... I personally would run it around EC 1.3 but evryones a bit different (within reason)

whats the starting EC of your source water?

most plants are suppose to tolerate good amounts of sulfur, but if your getting volumes from your source water.....
im not sure??
im sure theres a point to where you can have too much but I don't know what that number is, but I know its relatively high, to a reasonable point

do you have any other soures of iron supplement?
see what you can find
tell me whats in it and I can help sort out the dose with you

root rot
DWC is difficult to keep roots healthy if you can keep the water temps from climbing too high

the warmer the water the faster it breeds/brews bad bacterias and pathogens

in an ideal world youd keep you water temps around 65degrees F.. but that's not always possible

if your water temps are over 75 degrees F your always going to be chasing root health

I personally have not had success with BB in hydro so someone else who has would be better to get advise from on its use

a water chiller is expensive and creates more heat in whatever room its in and burn more electricity

if you continue to have root issues from warm temps on your next attempts you may need to consider another growing method

does you have an aeration tank on your well water

its a holding tank with vent holes.. the water that comes from the well is pumped up to the holding take

at the top of the tank there are mist heads that spray under high pressure

when the water is sprayed it releases sulfur gas from the water

typically the tank is filled by the sprayers until the float switch turn the pump off when the tank is full

but the idea is the water needs to be aerated/sprayed to release the sulfur gas

you could maybe do some research and DIY something

but that's only if you have extreme sulfur water (like south florida gets)

dont worry, i just compared to my tap water regarding the sulfur, i used straight RO Water so ca. 0 ppm start.
There is now 1.3 Maxigrow and 0.3 Calcium and magnesium sulfate in it.

If you give me some ppms i can enter them in hydrobuddy and will have the sulfur total, also have a water analysis entered there.

No other iron source, or at least nothing specific, would have ghe bioroot, enyzymes, mineral magic, epsom salt and clcium sulfate arround, beside some beneficals from TNC, Maxigrow and maxibloom of course too.

Yes 1.6 EC seemed high to me too, but i know this strain want a bit, indica with skunk parents.
The healthy parts (which is still 80% of the plant) is looking healthy, no burned tips at all, EC dont go higher, think i ma fine there.

OOH yeah, DWC is difficult it is a experiment, but i thought i didnt get it within 24h, also more expected it more in the clone bubbler where the clones where much too long.
Well even there i am not sure, i added ghe bioroot also beside some drops hesi super vit, this could be really everything right now... caution panicing beginner adding what he can to his soup.

Temp had been quite good at 71F, now theyre higher, but in this time of the year this should be doable, i have 60 outdoor here atm and there is just a LED light above, roughly half power.

Will star with a frehs mix and add a bennie tea then, the mykos and bacterias i put in the tank where a good decission as the plant roots seems lto like it.
I may can get some pics when i do the reservoir change

i just pump my reservoir tank now now all 2h for 15min in the main tank, gravity do the rest of the exchange, no extra aeration, idea was that it will be areated then when floating through the maintank.

if its not being sprayed/mist at high pressure it wont release enough of the gas

good tip never heard of it, but dont think that sulfur is my problem as i am not using my tap water, just pure well filtered RO.

Btw. i could get Canna 15% Calcium, but no clue what its based on or what it brings also, th label dont say anything about N or Sufur, or whatever.

Well, most probably the biggest problem is the root rot for now, but looks like i can learn form you a bit to mix a better reservoir next time