[tsopanis]

Hi. The plants in question are Sensi Skunk auto and Auto tutankhamon. They are in bloom already under hps 250 watts. Watering is done with dehumidifier water, PH Grated, plus fertilizers (which I do not run with a program.)
Temperatures with lights ON (26-29 celcius)
Temperatures with lights OFF (19-20 celcius)

The fertilizers I use are not some well-known company but the following
https://www.naturefert.com/Products/B...s/Algiton.html (As nitrogen)

https://www.humofert.gr/en/component/...2-rizobac.html (almost added with every watering)

https://www.anthini.com/%ce%a0%cf%81%...R/Default.aspx (for flowering stage)

And some photos:

Sensi skunk auto: (light distance from plant 38 cm/15 inches)
https://ibb.co/jMVuLH
https://ibb.co/nhYs7x
https://ibb.co/kn2Knx
https://ibb.co/cyHKnx
https://ibb.co/mjk5Sx

The actual problem is the yellowing of the top leaves and a small twist on leaves tips.

Auto tutankhamon: (light distance from plant 45 cm/18 inches)
https://ibb.co/i9aN7x
https://ibb.co/nKf0uc

Same problem here with the top leaves being lighter green/yellow.

[Bird of Hermes]

Some yellowing is normal late in flower. Not sure about those nutes you are using would need to know more about what NPK they have and how strong you are running them. Also need to know what kind of soil you are using.

[Easy7]

That's a good bit early to be fading to yellow so soon. I'd bump up the N just a touch for a month. Then fade back down.

[Bird of Hermes]

Originally Posted by Easy7

That's a good bit early to be fading to yellow so soon. I'd bump up the N just a touch for a month. Then fade back down.

I agree that sounds like a good idea when the plant is still leafing out and stretching early on they still want nitro.

[tsopanis]

I was thinking that it was Nitrogen deff but there are also some burnt tips on the leaves. Does this play any role? As for the soil it's a general use one. As for the fertilizers strength you can check the links I have posted above!

[cobaltrod]

you mentioned you are using "dehumidifier" water, if by this you mean you are taking the water from the drip pan on a dehumidifier and using that to water your plant, i would stop that asap, generally that water has dripped of the condenser coil thing or whatever the appropriate name is for it, and that can be made from copper, copper is toxic to plants in high enough concentrations and will accumulate in the soil, probably not whats up with things at the moment but just a thought, if the coils are aluminum its probably not an issue anyhow,
my guess on the leaf color would be slight nitrogen deficiency, dont go crazy trying to fix it and overdose them just bump it up a tad,
the other thing about dehumidifiers is the amount of heat they produce, what are the temps in your grow area running, heat stress can cause both yellowing and burnt tips at the same time, and if this is the issue you certainly dont want to bump up the nutes, this will only exaggerate the issue, but if temps are good , ph is good, its probably hungry, they can also get that look if they have gotten so dry that they wilt badly, then get watered and perk back up, sometimes the wilt is bad enough that the effected leaves never fully recover, but the plant will survive that and rebound pretty well usually.

[Bilboscrogins]

looking good mate , a little on the hungry side after stretch is all.