First DWC, Buds not getting bigger

Hi guys, already have posted before showing some problems that I had with my girls at the beginning. Now the plants have 70 days old and compared to my soil grows the buds looks super thin.
I'm working with a 450w (real watts) Growmaster Led (1800w efficiency). 5 gallons buckets, with 6w air pump each bucket. Hesi nutrients, actually working with 1,8 EC because they got nut burn with 2,0. PH in 5,8. Environment temperature 24°C and water temperature 20~21° C. With an air conditioner working at 18°C.( there is like 30~32°C outside my growing room). Good ventilation with air extractor and intractor.
The girls grown vigorously in veg (not taking in count the problems that 2 of the 4 had) and continued growing nice in pre flowering stage, but they didn't seem to get fat enough yet and the buds looks mature.
It seems strange for me that the buds are getting leaves full of resin instead of calyxes and they don't look fat at all...
They are 2 think different from Dutch passion (the 2 at top) and 2 dark devil from sweet seeds.They were supposed to be ready in 10~11 weeks from the first day, maybe I just need to give them more time, I dunno.

I don't really know what I'm doing wrong so any comment or idea is welcome.

Thanks!
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dwc nutrient requirements are much much lower than what you can give soil

im not sure how your nutes are and I haven't seen the pictures

but as for your EC
id drop it down to about 1.2

then watch your ph and EC in the reserviors thru the week
if the EC goes down and the ph goes up you might want to raise the EC (for no reason should you be over EC 1.5)
if your EC goes up less nutes
if the PH doesn't rise less nutes

im4satori said:

dwc nutrient requirements are much much lower than what you can give soil

im not sure how your nutes are and I haven't seen the pictures

but as for your EC
id drop it down to about 1.2

then watch your ph and EC in the reserviors thru the week
if the EC goes down and the ph goes up you might want to raise the EC (for no reason should you be over EC 1.5)
if your EC goes up less nutes
if the PH doesn't rise less nutes

Click to expand...

That is the last thing that I thought it could be the problem, actually I was lowering the EC levels through adding ph balanced water to the reservoir. But I think that they will not get bigger :/

excess fertilizer will not make bigger plants

im4satori said:

excess fertilizer will not make bigger plants

Click to expand...

I know, but they never had shown any excess up to 2,0 EC, and others guys here told me that I can raise the EC up to 2,4 in late flowering.

xxorezxx said:

I know, but they never had shown any excess up to 2,0 EC, and others guys here told me that I can raise the EC up to 2,4 in late flowering.

Click to expand...

no

your not looking to find the max EC to which excess symptoms occur
this is a flawed way of think....


your looking for the minimum EC where def doesn't occur

I promise

start out at max EC 1.2

if they show sign of def
and the ph is drifting up
and the EC going down

increase it
never above 1.5

if the ph doesn't drift up or the EC goes up
lower your EC

high EC of 2.0
the soil guys can get away with that much, not for DWC

think of it like this;

salts are minerals
minerals are salt
fertilizers are salt minerals

ocean water has excessive salt minerals,
mineral water has the appropriate amount of minerals for your health needs

which would you prefer to drink?
ocean water or mineral water

ocean water has more minerals in it so wouldn't it make your dick bigger? NO
and for your plants it wont make your buds bigger

your not looking to find the max EC to which excess symptoms occur
this is a flawed way of think....
your looking for the minimum EC where def doesn't occur.....aka mineral water not ocean water

im4satori said:

no

your not looking to find the max EC to which excess symptoms occur
this is a flawed way of think....


your looking for the minimum EC where def doesn't occur

Click to expand...

I think This is one of the best advises that I have ever read, I'll take this into consideration for next DWC and apply it for my next grows.