HELLLP!! please

[high riser]

Hipeeps,
I need some of your wisdom and experteise pls
Here are some stats:
dela haze in a water farm
600wt son lamp
Temps:
light on 25c
light off 19c
RH 45%
Res temp 20.5c
EC1.6
PH up and down like ayoyo
NUTES GHE 3part grow/micro/bloom curently 15/10/5mls in 10 ltrs thats stood for at least 24 hrs before being added to my res,pH+EC are stable at 5.8=1.6 respectivly.
Here comes my prob..I refill the res with the above solution check once more all o.k
8hrs later i return to check the EC dropped to 1.2 the ph has also plumeted4.9 to 5.0
Half a res of solutions gone 3.5to4ltrs, im thinking as the res has halfed in volume and the EC has also dropped my girls been eating up her food.EC never rises so cant be over fed can it??
But the PH plumetting like this can't be normal can it??
At that range lots of the nutes are gona b locked out surliy??

Has any one else experienced this in a water farm?
Then today when i went to say high to my lil tented friend her new growth looked a little sad please see pic below:what do you other water farmers think over fert or under fert??
As far as im aware all my climatic conditions are within range is going on
The last pic is of a lower fan leaf healthy enough?
Please help this is really boggling me

[high riser]

here is a link to the diary thinking of changing the title to Rocky Horror PIcture Show LOL
https://www.thctalk.com/cannabis-foru...ad.php?t=20358

[Donbronski]

Root rot??

[seanMcPot]

is your water in the "res" in direct light?
if it is this can fuk with the ph/ec as bacteria grows in the water

[high riser]

Root rot??

Hi mate no not pithium or any rot going on roots are lush and white all healthy.

[high riser]

is your water in the "res" in direct light?
if it is this can fuk with the ph/ec as bacteria grows in the water

YO sean, roots r in the dark had alittle issue with bit of green algal shyte in the drain tube washed it out with fresh water on one of the res changes? its beating me????????

[Donbronski]

pH meter in need of calibration?

[high riser]

Hi mate i calibrate once a week ph4 and 7??weird aeh

[seanMcPot]

pH meter in need of calibration?

good point,could be

[seanMcPot]

silly question but is she defo gettin water?
that second pic looks like it needs watering